I bought a refurb 27" 2.8 i5 Quad Core, 4GB, ATI Radeon HD 5750, 1GB memory in the last month. I called Apple yesterday asking if I could swap it out for one of the new models and they gave me the ok. So now I'm looking at the base 27" 2.7 i5 Quad Core, 4GB, AMD Radeon HD 6770M, 512MB. Is there going to be a major difference between the two video cards? I'm not sure how much better the 6670M is than the 5750. Dropping half the memory sounds like it could take a hit in performance. I was thinking of jumping up to the 27" 3.1 i5 Quad Core, 4GB, AMD Radeon 6970M 1GB, but I'd rather spend the cash on a 2TB HDD instead since I've almost maxed out my 1TB. I'm not a heavy gamer. Mostly Civ V, Starcraft, Diablo III when it hits and the Star Wars: Knight of the Old Republic MMO via bootcamp when it releases. I'll probably throw in a few other titles here and there as well. Other then that I use handbrake a lot, Pages, and iTunes to stream to my AppleTV 2. I also do some minimal video editing on it as well.