Foster,
The Class D/icepower BC ref1000m monoblocks I am using meet all your criteria except for price and power exceeds your stated range at 500w/ch into 8 ohms, which is generally more of a boon than a problem with most large full range speakers built to run all out at higher volumes.
The bass is absolute top notch in my opinion with any kind of music, have not heard anything better in terms of proper weight along with refinement/articulation, at least in my two well tuned rooms (one larger and one smaller). In the sunroom, anything I use that sounds balanced and right in those two rooms tend to go a bit boomy and bass heavy, which clearly indicates that the room is the thing that brings the performance level of an otherwise nicely balanced rig down a notch or two, at least in my case.
I think this is one of the amps that Tvad mentioned above that he has tried and found to deliver properly balanced sound.
I've tried every "good" speaker and amp combo I've owned current and past in that room and always similar results, OK but not great.
I haven't tried my realistic Minimus 7s taht I use over the summer on the deck though! THat might be worth trying! Smaller may be better in a case like this with overzealous room acoustics!