Which Distro + Kexts would work best for me?

CPU: Intel Core 2 Quad Q660 (x64, 2.4GHz)
GPU: Sapphire ATI Radeon HD 4850 (512MB, PCI-E)
RAM: 4GB Dual Channel DDR2 SDRAM 800MHz
NETWORK: Linksys RangePlus Wireless G/N Card WMP110 (PCI)
PCI: RealTek PCI-E GBE Family Controller
CD DRIVE: PLDS DVD+ -RW DH-16A6S ATA Device
HARD DRIVE: WDC WD5000AAKS-75A7B0 ATA Device
MONITOR: Dell E207WFP (1680x1050)
MOTHERBOARD ID: 64-0100-009999-00101111-092608-Eaglelake$1ADXP005_BIOS DATE: 09/26/08 15:21:57 VER: 0.0.1
MOTHERBOARD/COMPUTER NAME: Dell Studio 540