I own 2 xpa2's {both gen ones} the one i use most is 2 years old no issues as of yet, that sucks, sounds like you got a lemon, they should be responsible for it, I would call until you get an answer...
Anyway, I have tried many many amps, as far as pro audio goes, I don't like worrying about tweeters {the entire class d thing could be a myth, but its still in my head}, they are ugly, have lights all over them {some do some dont}, no triggers, cooling fans, then you have the entire preamp impedance issue, also aesthetics {I like my systems to look nice}, ect.. I own some proamps, but I prefer amps made for home audio in my home audio systems.....
If you want to get away from the emo stuff, I think the outlaw mono's would be the next best bet, B stock can get you a par for $560 or so, I have 2 in my 2.2 system, and I love them, mono blocks are my preference for music only systems {no cross talk, whether the amount a stereo amp has is audible or not, mono blocks must have less rite?}