Haven't read any reviews of the Monster's, but IMO, they are not nice looking amps.

And ... maybe there's a reason why they can be had so cheaply now.
Acurus used to make 3 channel amps, the 100x3, 200x3, and A200x3, but they aren't made anymore. Acurus used to made by Mondial Designs, who also made Aragon. Good amps.
All the other ones mentioned are good ones too IMO: Rotel, NAD, Adcom, and Outlaw is a really good value for the money, Parasound, etc. I also like Anthem.