I have a Denon 4700H 11.2.4 setup and after months of research into the pro's and con's of all the different class power amps, I finally pulled the trigger and just purchased a Monoprice Monolith 3 channel B-Stock for just over $1000 and I am very impressed by the sound improvement. I was using a Emotiva BasX 2 channel for my front L&R, which I now use for my 2 surrounds. The Monolith is assembled in the USA with some parts from probably China, but most Amps, like Emotive etc do the same thing. It appears from my research the Monolith is Made by ATI and has really impressive specs. You might want to check it out as a reasonably priced alternative.
As with all classes of power amps you have to weigh the pro's and Con's. I like Class A, AB Amps for their warmer sound and headroom. I have 2 Adcom 5500's in my dedicated music system in my Man Cave for many years now and they kick ass. With it's 1800W power supply it weighs in at around 70 lbs so you need something sturdy to place it on.
Unless your dead set on Class D or H, you might want to check it out.
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