Wow, Deevos them specs are quite an overshoot dude...
My system (IMO) is rather powerful and I have no problem at all obtaining a constant 60fps with my specs! I also run DOOM 3, Crysis, Assassins Creed all on full settings with full AA and AS with my specs with significant fps. Whilst those specs are sweet, my setup is:
AMD Athlon LE-1640 (2.6Ghz) x64
2GB RAM
ATI 4670 (1GB) - Which I might add is THE best investment I have EVER made, you'd be very suprised at the capabilities of this card! I bought it 2 years ago, it supports SM 4.1 and the rumoured (1gb oversold) wouldn't be up to par, that wouldn't be the case!
Running: XP /sp3
People are running about today purchasing new hardware, the latest graphics cards (i used to do this myself years ago) until I last upgraded my comp 2 years ago when I bought the board and processor as a bundle from Scan for £90, £68 for the ATI card and £40 for the RAM, bought a 500GB sata HDD off GUMTREE for £40 and bob's your uncle. I can do all my modelling, post video production and gaming all on one machine for the cost of what? Less than £200!
FPS Creator seems to run rather smooth on my machine, never experience any lag (apart from the obvious) but I try to pay a LOT of attention to my level design to get it right first time!