II have a gtx 285(320 $ new)but I see a review between gtx 275 & gtx 285 http://www.techpowerup.com/reviews/Powercolor/HD_4890/6.html
In some games it seams gtx 275 win against gtx 285 !!! End it is at least 70-90 Usd cheaper, for start a gtx 275 is 250 USD !!!,what a great card single or in Sli, best card for the moneyhttp://img.tomshardware.com/forum/uk/icones/message/icon6.gif
Because I prefer single card not 2 or 3, I acquire the GTX 285, 4 days ago. But I now that is overpriced, better for money is gtx 280!!!
6 months later:
Just a performance update; my EVGA GTX 275 is able to get an average of 58 FPS on Grand Theft Auto IV.
As far as Overclocking goes, I was shipped their 'superclocked version' and I achieved clocks of 713 Core, 1548 Shader, and 1242 Memory.
My single 275 at said clocks was able to achieve a score of ~5250 at 1280x1024, AA 0x, 60 sec, Full Screen in FurMark.http://www.ozone3d.net/benchmarks/score.php?id=0c6f350be3711bc7a09e197e2ebdca2d
Now compare that to someone's Radeon HD 4870. (It scored 3500)http://www.ozone3d.net/benchmarks/score.php?id=2a776d76091683c8c8c9583440339b0f