Please help, What tube preamp?

HHMMMUUMM ---- Warm & Crisp ha... sounds like trying to push when yea should be pulling.. That sounds a little tough to ask for,,, I always found it to be one or the other or is it that compromise... I read enough and going to bed -- good nite

I guess I showed my true colors in asking about a warm, crisp sound. I did not realise I was being counter preductive. Maybe I should have said a sound that is warm, clean, with no rough edges. Thanks for the advice so far. It is helpful.

A couple of recommendations in isolation (i.e. I do not know if these preamps play well w/ Krell electronics) are:

Audio Research SP-6A or B or C, SP-10 mk2, SP-11
Kora Equinoxe

FWIW. YMMV. IMHO.

Blue Circle 21.1
Audio Note M2