Oh, crap. I forgot about the PSU demands.
Sabre, at your resolution, just get a 4770 512MB and call it a day. Its GPU is actually 40
nm, not the 45nm that I initially believed it was, and it barely draws 80W (80 watts/12 volts=6.67 amps) so there'd no extra expense involved. Like I said, you wouldn't notice much of a difference in performance because of the 4770's higher clockspeed.
Oh, and you do get a (sort of) bonus by combining that motherboard, which features an integrated ATI GPU, with an ATI video card. It's called Hybrid Crossfire, which combines the power of both GPUs. I'll admit that I don't know much about it, though. I would theorize, however, that if the motherboard GPU is that much weaker than the one in the video card, which in this case it definitely would be, it might actually degrade
the overall video performance. It'd definitely be worth checking out, though.