Hello everyone.I got this pc below:

22" hd monitor
P67 motherboard
realtek hd audio for sound card
intel gbit lan for network adapter (I will be adding a pci wireless adapter soon)
sandy bridge 2500k cpu
4gb ram
2x radeon HD5850 crossfire
2x samsung hdd raid 0 config
logitech keyboard and mouse both usb.

will I able to use leopard in this pc? which version should I choose? im kind of lost here. Tried reading posts, guides etc but now im completely lost and sorry if its an early post or already asked-answered. thank you for reading have a nice day.