Strong cherry picking the benchmarks.
And you had to resort to 3DMark06
The HD 4770 should be down to under $100 in a few days. I think it's worth it to wait.
"When it comes to the resolution of 1920x1200, the Radeon HD 4770 beats the Radeon HD 4830 and GeForce 9800 GT, outperforming them by an average 16% and 29%. It also leaves the GeForce GTS 250 behind in most of the tests, except for F.E.A.R. 2: Project Origin where it is 26% slower.
In the other four losses, the Radeon HD 4770 is slower by less than 13%. The average difference between the Radeon HD 4770 and Radeon HD 4850 is only 7%, which can be easily eliminated by means of overclocking. And this is a graphics card with a 128-bit memory bus and fewer ALUs and texture processors! What is especially amazing, the Radeon HD 4770 maintains a playable frame rate in quite many games. That’s very good news since the resolution of 1920x1200 is not a prerogative of 24-inch or larger monitors anymore. The resolution of 1920x1080 is getting popular, too."
"At a resolution of 1680x1050 the average advantage of the new card over the Radeon HD 4830 and GeForce 9800 GT is 15 and 20%, respectively, and the advantage over the GeForce GTS 250 512MB grows to 2%. The Radeon HD 4770 is only far slower than the latter card in two tests now: F.E.A.R. 2: Project Origin and Tom Clancy’s H.A.W.X.
Considering the difference in price, the Radeon HD 47700 is the winner. "