I, too, have had a pair of Rhea's in my system for the last six months and have been very happy with them. They replaced KEF LS-50's and were a big step up (for my taste and circumstances). My basement listening room has stone walls and a concrete floor, and I kept adding more and more absorption to tame the KEF's perceived brightness or edginess. With the Rhea's this is not a problem, and I have removed some of the absorbing panels (though not the base traps in the front corners). I still get excellent imaging and detail, but no harshness or edginess whatsoever. I do have the Rhea's well out in the room, which may explain the fact that I have not found their bass output to be excessive as some have reported. I even turned my subwoofer back on after a few weeks, just to get those last few Hz.
Room is 12' X 23' X 7'. Other components are Auralic Aries streamer to PS Audio Directstream DAC to BHK preamp to Stellar M700's.