I second the Unico. Yes, I own one - but I know its strengths and weaknesses (in stock form) quite well.
The Unico fits the bill as you describe it to a 't'. Warm enough to smooth out 'bright' speakers and enough power reserve to get you boogying, especially with higher-efficiency speakers.
The Unico fits the bill as you describe it to a 't'. Warm enough to smooth out 'bright' speakers and enough power reserve to get you boogying, especially with higher-efficiency speakers.