Again, don't get caught up in the watts game. I've had amps that were rated 100 watts & less that were better sonically than bigger pieces. Unfortunately, they are not in your budget, however, they are not out of reach either.
My suggestion is to go to the search feature on the home page and search by price range in the amp category. You can stick to your budget & get a good idea of what's out there. Of course, it may take a few tries to get it right but I don't think you can go wrong if you do your homework.
As for house sounds, the B&K is on the warm side of neutral. The older Adcom's are not as refined & tend to be somewhat grainy. I haven't heard any newer Adcom stuff in a long time so will withhold comment on these. The Bryston ST series does have excellent bass control but is more on the analytical side.
That's it in a nutshell.