make sure you cop that SSD breh, shyt is great. they are coming down in price, they had the crucial m4 128GB for $100 recently. it might be cool to raid0 2 of them if you have nothing to do
the 6850 is fine. 2tb like liquid said, if you dont have that kind of storage already.
i personally wouldnt get the korean monitor. you could probably cop a 24" acer/asus from newegg for 120-140 or so. you could cop a the new i5 ivy bridge from microcenter for 189 and get 50 off a z77 asus/gigabyte board. a 700 watt corsair power supply ($70 or so?). 8 gigs ram.
my calculations (i built this computer for someone a week ago)
cpu + mobo $310 with tax
graphics card: $140
ram: 45 for 8 gigs
2tb hd: i stripped of a external 3.0usb seagate - 80
SSD: i actually got the 256 gig m4 for $200
psu: 70
case: antec p280: $100
- 950 ish. add a few more for random shyt if im forgetting something. monitor is about 150 extra
if you have a strict budget then i would stick to a 128 gig and a smaller hd. you could get a sandy bridge i5 and an z68 processor for even cheaper