Thanks for that link! I've seen it before but I couldn't find it for the life of me.
It appears that the 5830 performs quite a bit better than I was thinking.
Based on that chart, here's what I see. Compared to my GF9800GTX+...
5750 = ~30% Increase in performance
5770 = ~50% Increase in performance
5830 = ~90% Increase in performance
5850 = ~105% Increase in performance
5870 = ~150% Increase in performance
And then you have the Fermis...
I may end up going with the 5830. I know the 5770 is a solid performer, but it appears there is quite a performance jump there, and the price difference isn't that extreme.
Thanks guys! If anyone here has the 5830, I'd love to hear from you!