Gaming in linux using Vista in virtual machine

[Galaxian]

i'd really like to break free of windows and try something like ubuntu with beryl as my main OS.
i dont want to dual boot cause thats too slow and annoying.
vista is a headache and linux with beryl.well looks freaking way better and faster

i had the idea to use vlite and break vista down to just bare bottom essentials for gaming only and have it run in a virtual machine under linux

does anyone know if its possible to install vista ultimate in a virtual machine like xen under linux and install pc games within it and work?

supposedly xen is faster than vm ware using only 3%, i know virtual pc only supports 2d..gee wonder why
even if its a tad slower to do so i wouldnt mind but just be happy to know its possible