Well it really depends on some things, but I'm sure you could come up to 10k easy including peripherals. Does he plan to play music? Some nice Rocket speakers on a 7.1 receiver would eat up a nice chunk. Video playback? A 36" LCD would run 5k (I like the Sony, but on the AV boards they're rated as nice but overpriced). Heck, a 36" LCD would be nice for a gaming system. So, in conclusion, 1000-2000 for the actual computer, 8000-9000 for output devices. You'd get something worth while that way.