I have an AMD Dual-Core 5600+ 2.91GHz processor

4GB RAM (DDR3 I think)

Alesis IO26 external firewire sound card running through a Texas Inst. Firewire PCI card

Graphics are internal but I do have a 7600GT PCI-E card if needed...

And hard drive is SATA II (if that's even relevant)

Sorry for being a complete noob but your help will be much appreciated!

Would it be possible to install OSX on my system? If so which version should I go for and how do I start this whole process?