"03-30-15: Dweller
Cary, Manley, Wavac.. Alright, who did I miss?"
Those are all good ones. I think a couple of the Asian companies make them as well. I forget if Audio Note makes integrateds. Although I'm pretty sure they do.
Another option you may want to consider is just getting a really good power amp with a high quality passive volume control. If you are willing to buy used, you can probably get the same amp I have, a VAC 30/30. It sounds incredibly good and it has tons of power, considering its just 2 300b's per channel. It easily drove to normal listening levels, in a medium size room, Martin Logan SL3's, ProAc 2.5's, Vandersteen 2's and 1's, and now my Wilson Cub's. If you're in the market for an amp like this, you just can't go wrong.