How are/were the 27" Core 2 Duo iMacs? I will use it primarily as a business computer, with it performing Photoshop / Illustrator duties as well. I don't have time for games, so that's not an issue for me. I know some of the 27" iMacs had issues, and I don't want to buy a lemon. I can pick up a 27" iMac 3.06 Ghz Core 2 Duo, 4 GB Ram, 1 TB Hard Drive, 512mb graphic card for $1350 shipped. Opinions? I don't think the i5/i7 processor will make much difference in what I'm doing.