I thought the same thing when i seen the refresh the other day. I have the 2.8 i7 27" iMac...
I dont game, so the upgraded GPU is pointless to me, so that leaves me with the .5ghz speed upgrade ( did i calculate that right? ) and the SSD option..
The SSD option is KILLING ME! I would so love to have a SSD along side a 1TB HD for storage.
I must have been lucky when i got my iMac, got it from a local apple store. No sound issues, no yellow tints, not 1 single issue ( knock on wood ) so my guess it I SHOULDNT upgrade...
Though i was thinking dual i7 iMac running side by side.......HMMMMMM that would be so awesome! and soooo $$$$$, its 3,000.00 for the fully loaded i7 iMac.....