I'd go for a X1900 GT
, unless you can afford to spend more and then get a mail-in rebate.
For example, a X1900XT would be a much better card for $299
, but that's after a giant rebate of $100. You could also get one for $275
, but that one seems to be of lower quality (though I'm not entirely sure of that) and it too is after a $100 rebate. And those are very close to your price limit, so an X1900 GT shouldn't be a bad
card, just not nearly as good as the X1900XT. WAY
better than the integrated 6100.
I'd go with one of these unless
you intend on SLI, but I assumed that you weren't because you said a
X1900 GT vs. X1900XT