Monkey wrench... What about Marantz & Harman Kardon?
What price range? That alone can make a big difference from each of these manufacturers. Denon for example, I don't really like any of their lower models too much, it really isn't until you get up to the 3805 and above that I find them to be pretty good, and there's a pretty big difference going from the 3805 to the 4806.
IMO, first look for the features you MUST HAVE (auto-EQ, PLIIx, etc...) within your price range. Then go listen to the top 3 on your list and pick the one that sounds best to you. Seeing/hearing/touching these guys in person should give you the feel for build quality.
ALL manufacturers have issues with quality at some point or another, so it's tough to really get a good feel for it to compare one manufacturer to another. Usually, there will be issues right when a new line comes out, possibly localized to certain models, but usually within a few months, the issues are addressed (hopefully).
Lower THD is better, but it isn't going to tell the whole story, just like a claimed rating of 100wpc doesn't necessarily tell you how well an amp can handle a low impedance load.