Low Budget + Gaming PC = Don't hold your breath.
I see these threads with ($400, $500, $600) Budgets, I just scratch my head and wonder why someone wouldn't just go with a console, wait for availability of the XBOX 360. That's comparible to a $2000+ Budget PC when it comes to gaming.... With a $600 budget... YOu could get the console, a bunch of games and accessories...
I just don't understand....