HD 5750 out aswell

AMD/ATI is getting incredibly good at chip harvesting it seems, if you notice every level has fewer SPs meaning lower performance, but not requiring a new chip. Im curious if there will be a chance of unlocking the spare cores on 4850s and 47xx's, it will be interesting to see.
 
I doubt it, not as things currently stand. The 4770 was nearly as fast as the 4850. The 5770 is a touch slower then the 4870. I've seen a review or two of these cards, but I don't remember where the 5750 stood. (to busy looking at the 5770.) If your check the reviews, I'll bet you'll see the 4850 staying on top, with the 4770 and 5750 just behind it. The reason to buy the 5750 is that possibly the 4770 and the 4850 for sure will no longer be made.