Re: $1000 - $1200 high end PC.
For $1000 I'd recommend an AMD Phenom X6, for $1200 you could probably squeeze in a 1366 i7. Since the build won't be too heavy on gaming you can get by with a cheaper graphics card (5770 or so, maybe even less). I would recommend an i7 but you'll want more than $1200 for a good i7 build with a decent cooler for overclocking. Mine cost $1500 after adding an H50 cooler but that's with a 5870, even then with only a $200 GPU you'll still need $1300 and I don't include any software or accessories in my build prices.