Ah yes, it's that time of the year again. Now, I am extremely happy with my current 27" iMac. But if I can get it sold for a good amount of money then I might just step up to one of the new 27" iMacs. I just want to know how much performance you'll gain by stepping up to the 6770m or 6970m. I've been unable to compare the 5670 in this one with anything out there, I just CANNOT find ANY information or benchmarks out there!