Installing Kicker 650.4 and 2500.1 currently - my brother and I have been Kicker amp guys for the past couple if years (2007ish), he's deviated on a few builds and I have not. His reason was cost vs power in a sub application.
You might get some flack for the Kicker suggestion, though I can say I've never had one die on me.
I can offer a better review in the next few weeks when I complete the first phase of my build in using these amplifiers in an SQL application. Again, others disagree with the word Kicker in the same sentance as SQ.
The other great benefit is these things sell really easy used, and maintain value. If you don't like them, you won't be stuck with them. Alternately you coud always find a used one to try.........