I can see only one real advantage - you eliminate speaker cables from the chain. As for the best match for particular speakers - there is always a better match, including custom or customized amps. And it is hard if not completely impossible to deal with amps vibrating with speakers. This is a very flawed concept overall. The only kind of thing from pro audio world that is desirable is the source, when it is good, I mean. Audiophiles want sophisticated sound and generally are much more concerned with sound quality than pros. With some notable exceptions.
However, if the OP insists - just get top of the line ATC and call it a day.
