Until the "VM" is in hardware, there are going to be compromises - especially for hardware-intensive things like gaming.
It's probably a moot issue at this point, but you still have a couple more options, I think.
1) Snow Leopard on PC hardware - http://tonymacx86.bl...dge-customac.html People triple-boot such things.
IIRC, Apple's license will allow virtualization of Lion. (They presently allow it on OS X Server, IIRC.) I'm sure they'll still make it non-trivial on non-Apple hardware though. Lion is expected to run fine on TonyMac's stuff, but things do break. (I've not been brave/stupid enough to try it myself as I don't have any appropriate hardware.) I believe that people have run OS X in VMs on PCs, but I don't recall the details.
2) BootCamp supposedly supports XP, but you need the right version - http://support.apple.com/kb/HT3777 - that was last updated in March.
HTH a little. Good luck!
Cheers,
Scott.