If you are thinking of buying VPC for gaming. Don't.
Get a semi-old pc, kvm and a really good video card.
I got an AMD Tbird 1000Mhz, with a GF3Mx (Cheap) and 256 ram. Popped in a old 10 gigger I had, then i got a kvm for 30 bucks to toggle my monitor between mac / pc. All for under 300...