Looking for a particular amp


I'm looking for a particular STEREO amp with the power ratings of; 100w@8ohms 200@4ohms 400@2ohms.
I know Krell could fit the bill based on those specs alone, but I'm not sure of any other makers and major sound characteristics for example; Classe or Mark Levinson ect.
Used is fine, I'm more concerned with the overall sound characteristics rather than price ie. Foward or bright vs. laid back or dark, sound stage wide vs narrow ect. ect.I'm pairing them with Apogee calipers. Impedance 3 ohms.
I'm not as content with what I have driving them now I'm looking for more bass control particularly when I rock out at loud levels.I also listen to jazz and some folk but it seems that with rock when I want to turn it up even just a few more notches the lack of control seems to reveal itself.
I realize that there are other more sensitive speakers but I'm not interested in just louder. I've lived with the calipers for 32 years and I still love the presentation they have. Thank you.
128x128joes44