Electronista has a much more qualitative analysis, but they still love the new machine. Their "biggest" problem (aside from the usual complaints about the glossy screen and a lack of easy-to-reach ports) seems to be just the size of it. The 27" iMac is a big machine no matter how thin it gets. But they agree: with the i7 in there and all of the extra options, the iMac is a monster, matching up to the Mac Pros sitting in the lower atmosphere.
Good stuff. I'm not personally in the market for a new computer, but man -- if I was ready to spend $2000 on a quality machine, it's tough to consider anything else a better purchase than the new iMac.
UPDATE: Chart graphic is from Timon Royer, we regret the omission.