AR vs Cary vs Blue Circle vs...

I am looking for an amp on the used market. I currently have VTL MB-125 monos, which I like very much. However, I need to go to a single chassis unit due to space issues. I'm looking for an amp that is pretty quick, detailed but not etched, nice mids and a strong, though balanced low end. I don't mind a little warmth, but prefer sound that is not overly warm and leans a little more toward neutral. Music I listen to is mostly jazz and acoustic/vocal. However, I do put in the occasional classical, alternative and even some hip-hop.

The amps I'm currently considering are:
Audio Research V100 mkII
Cary V12i
Blue Circle BC28
VTL ST-150 (if I can find one used)

and possibly, in the solid state market:
Musical Fidelity A308 cr
Calssé CA200 or CA300

I'm more interested in tubes at this point, just trying to find something that is not too warm, clean and crisp sound. Appreciate any thoughts!!

ps. I'd prefer not to list my system, as it may change once a decision is made. Also, hoping people have made some comparisons with some of these. Thanks!!