The other idea expressed by Jax that you have to spend a lot more than Emotiva's prices to get dramatic differences in sound quality I must also take issue with. Both of Schiit Audio's amps have far superior SQ than Emotiva and at 699 and 799 are cheaper than Emotiva's XPA line. Adcom's current line up also measures quite a lot better than Emotiva's XPA line, albeit at somewhat higher prices. Outlaw Audio's multi channel amps also measure better and sound better, take it from personal experience.
In fact there are several companies now making amps that challenge Emotiva's price/performance levels, and some of those are Class D designs. I'll disclose that I was a true blue Emotiva fanboy, but got the shock of my young life when I swapped in a Parasound Halo amp. Putting aside one's fanboyism is the first step in realizing the world is not Emotiva blue.