I'd like to try osx on my desktop computer, I have macbook and I love it. which distro is the best?

My mother board is M3A32-MVP DELUXE:

AMD Socket AM2+ Processors
Phenom™ FX / Phenom X4 / Phenom X2 / Athlon™ X2 / Sempron™ processors
AMD Socket AM2
Athlon 64 X2 / Athlon 64 FX / Athlon 64 / Sempron processors
AMD Cool'n'Quiet™ Technology
*Support CPU up to 140W
Support 45nm Phenom™ II CPU
Chipset AMD 790FX/SB600
System Bus 2000/1600 MT/s for AM2 CPU
Up to 5200 MT/s; HyperTransport™ 3.0 interface for AM2+ CPU
Memory 4 x DIMM, Max. 8 GB, DDR2 1066/800/667/533 ECC,Non-ECC,Un-buffered Memory
Dual Channel memory architecture
* DDR2 1066 is supported by AM2+ CPU only
** Refer to ASUSTeK Computer Inc. or user manual for Memory QVL (Qualify Vendor List)
***When installing total memory of 4GB capacity or more, Windows® 32-bit operation system may only recognize less than 3GB. Hence, a total installed memory of less than 3GB is recommended.
Expansion Slots 4 x PCIe x16 with ATI CrossFireX™ support, @ dual x16; tripple x16 / x8 / x8; or quad x8 modes
2 x PCI 2.2
Support PCIe 2.0 / 1.0 Architecture
Storage Southbridge
1 xUltraDMA 133/100/66
4 xSATA 3 Gb/s ports
Support RAID 0,1,0+1
Marvell® 6121 and 6111 SATA controller
1 xExternal SATA 3Gb/s port (SATA On-the-Go)
2 xSATA 3Gb/s ports with RAID 0, and 1 support

LAN Marvel® PCIe Gigabit LAN controller featuring AI NET 2
Audio ADI® AD1988 8 -Channel High Definition Audio CODEC
Coaxial / Optical S/PDIF out ports at back I/O
IEEE 1394 Agere® FW322 supports 2 x 1394a ports
USB 10 USB 2.0 ports (4 ports at mid-board, 6 ports at back panel)
ASUS Unique Features ASUS Quiet Thermal Solution
- ASUS AI Gear 2
- ASUS AI Nap
- ASUS Fanless Design: Pure Copper Heat-pipe solution
- ASUS Fanless Design: Stack Cool 2
- ASUS Q-Fan 2
- ASUS Optional Fan for Water-cooling or Passive-Cooling only
- ASUS 8+2 Phase Power Design
ASUS Crystal Sound
- ASUS Noise Filter
- ASUS AI Audio 2
ASUS EZ DIY
- ASUS Q-Connector
- ASUS Q-Shield
- ASUS O.C. Profile
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 2
Special Features Multi-language BIOS
ASUS MyLogo 2
Uses 100% All High-quality Conductive Polymer Capacitors!
Overclocking Features Intelligent overclocking tools
- AI Overclocking (intelligent CPU frequency tuner)
- ASUS AI Booster Utility
- ASUS AI NOS (Non-delay Overclocking System)
Precision Tweaker 2
- vDIMM: 35 -step DRAM voltage control
- vCore: Adjustable CPU voltage at 0.0125V increment
- vChipset 16-step Chipset voltage control
SFS (Stepless Frequency Selection)
- FSB tuning from 200MHz up to 600MHz at 1MHz increment
- DDR Memory tuning from 533MHz up to 1066MHz
- PCI Express frequency tuning from 100MHz up to 150MHz at 1MHz increment
Overclocking Protection
- ASUS C.P.R.(CPU Parameter Recall)
Back Panel I/O Ports 1 x PS/2 Keyboard
1 x External SATA
1 x S/PDIF Out
1 x IEEE 1394a
1 x LAN(RJ45) port
6 x USB 2.0/1.1
8 -Channel Audio I/O
Internal I/O Connectors 2 x USB connectors support additional 4 USB ports
1 x Floppy disk drive connector
1 x IDE connector
6 x SATA connectors
1 x IEEE 1394a connector
1 x CPU Fan connector
2 x Chassis Fan connector
1 x Power Fan connector
1 x S/PDIF Out connector
1 x1 8-pin ATX 12V Power connector
24 Power connector
Front panel audio connector
COM connector
Chassis Intrusion connector
CD/AUX audio in
System Panel
BIOS 8 Mb Flash ROM
DMI 2.0
AMI BIOS
PnP
WfM 2.0
SM BIOS 2.3
ACPI 2.0a
ASUS EZ Flash 2
ASUS CrashFree BIOS 3
Accessories User's manual
1 x UltraDMA 133/100/66 cable
1 x Floppy disk drive cable
1 x SATA cable
1 SATA power cable
3 in 1 Q-connector
Optional Fan for Water-Cooling or Passive-Cooling only
ASUS CrossFire Bridge Cable
Q-Shield
ASUS CrossFire Bridge Cable
1 x Multi-function module (IEEE 1394 + USB2.0)
Support Disc Drivers
ASUS PC Probe II
ASUS AI Suite
Anti-virus software (OEM version)
ASUS Update
Form Factor ATX Form Factor
12 inch x9.6 inch ( 30.5 cm x24.4 cm )
This is what says lspci:
00:00.0 Host bridge: ATI Technologies Inc RD790 Northbridge only dual slot PCI-e_GFX and HT3 K8 part
00:02.0 PCI bridge: ATI Technologies Inc RD790 PCI to PCI bridge (external gfx0 port A)
00:04.0 PCI bridge: ATI Technologies Inc RD790 PCI to PCI bridge (PCI express gpp port A)
00:06.0 PCI bridge: ATI Technologies Inc RD790 PCI to PCI bridge (PCI express gpp port C)
00:07.0 PCI bridge: ATI Technologies Inc RD790 PCI to PCI bridge (PCI express gpp port D)
00:12.0 SATA controller: ATI Technologies Inc SB600 Non-Raid-5 SATA
00:13.0 USB Controller: ATI Technologies Inc SB600 USB (OHCI0)
00:13.1 USB Controller: ATI Technologies Inc SB600 USB (OHCI1)
00:13.2 USB Controller: ATI Technologies Inc SB600 USB (OHCI2)
00:13.3 USB Controller: ATI Technologies Inc SB600 USB (OHCI3)
00:13.4 USB Controller: ATI Technologies Inc SB600 USB (OHCI4)
00:13.5 USB Controller: ATI Technologies Inc SB600 USB Controller (EHCI)
00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 14)
00:14.1 IDE interface: ATI Technologies Inc SB600 IDE
00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA)
00:14.3 ISA bridge: ATI Technologies Inc SB600 PCI to LPC Bridge
00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge
00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor HyperTransport Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Miscellaneous Control
00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Link Control
01:00.0 VGA compatible controller: nVidia Corporation GT200 [GeForce GTX 280] (rev a1)
02:00.0 IDE interface: Marvell Technology Group Ltd. 88SE6121 SATA II Controller (rev b1)
03:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8056 PCI-E Gigabit Ethernet Controller (rev 12)
04:00.0 IDE interface: Marvell Technology Group Ltd. 88SE6121 SATA II Controller (rev b2)
05:08.0 FireWire (IEEE 1394): Agere Systems FW322/323 (rev 70)