My PC is a gamin PC and i paid just under 1 grand for it.
see below in signature for spec.
The only game it is challenged with currently is the origional Crysis (crysis 2 runs fine).
The best graphics card I can recommend is the GTX460 Super over clock edition. for £155.00. i bought the OC2 eddition as it was the best at the time and 2 weeks later the Super overclock version came out being cooler, faster and £5 cheaper !!!