Well, interesting responses above indeed!
Taking a break from my skipping and jumping, I see that two of the lines I carry, Thor and Atma-Sphere, have already been recommended. I love it when people agree with me.
I might add that Atma-Sphere pre-amps and Atma-Sphere amps together have a most musical synergy. If you're using a single-ended amplifier, then the Thor is what you're looking for. I use these pre-amps to demo big full range Sound Lab electrostats, which are perhaps the most timbrally rich and revealing speakers out there.
And now off to press some wildflowers...