That's a good deal. The 4830 does a slightly bit better than the 9800GT. But, they can be overclocked more than the 9800GT's can. You can get them for less than $90 with free shipping. It's still your call.
Also why dont you just get an HD 4770?? it destroys the hd 4830 and 9800gt. In fact it matches the gts 250. So the hd 4770 would give you the best price vs. performance.
Also why dont you just get an HD 4770?? it destroys the hd 4830 and 9800gt. In fact it matches the gts 250. So the hd 4770 would give you the best price vs. performance.