I am looking at putting together a cheap system for games development. And a little game-playing (I like to call it "market research"...)
Intel Pentium G860 Boxed
Samsung EcoGreen F2 HD103SI, 1TB
Cooler Master Elite 360
Cooler Master Hyper 212 EVO
Noiseblocker XL1 120MM, 120mm
Thermalright Chill Factor 3
Corsair CMV8GX3M2A1333C9 (8MB)
Asus ENGTX550 Ti DC TOP/DI/1GD5
Asus P8H67-M Pro
The Asus MB has USB 3 ports and lots of HDD connections. The pentium is the most money I want to spend on a processor and will upgrade it eventually. The Antec PSU looks really good. The 550 Ti is good without being over-the-top.
At least that's my reasoning! :-)
My other thought is that I could get a piledriver-based system (when they are available) as compilation, archiving and so on would all benefit from the higher number of cores on AMD chips (I know that single-core and for most tasks they are slower than Intel).
What sort of games will you be developing? Will you be doing any of the graphics work on the new games?
If you're doing any sort of graphical work beyond 2D sprites, I'd scratch the idea of doing a budget build of any sort. The rendering times alone will eat you alive - this is what high end hardware was really made for.