Consoles have no other useful function than to trap gamers where the games svck, so they can focus on vacuuming up the money. I mean Crysis 1 is still far beyond anything the consoles have, and because of moddability and config editing, PC games will ALWAYS be ahead. At least until unlimited detail is complete.
Buy a cheap computer with a big case, and then get a ATI Radeon HD card like a 5870 or something, and plop that in, get yourself up to 4-8GB of RAM, and make sure your processor is at least dual-core and 2.0+GHz. In the end considering all the uses of a computer, the console is just a distraction, and a waste of money.