I've got a custom PC with the Foxconn A7GM-S motherboard, AMD Athlon 64 X2 7750 processor, and PNY XLR8 VCGGTS2501LXPB GeForce GTS 250 video card.

What's the best distro (and maybe a tutorial?) to get me started with OS X Snow Leopard (preferably) or OS X Lion (if no SL)?