I'm looking into running a preamp into my newly acquired stewart 1.2 world power amp.. I'd like to get some tube like warmth from the unit, and was hoping to achieve that with a 1U preamp.. I'm not too convinced that a tube-preamp will achieve warmth just based on the fact that it has a 12ax7 in it.. So I'm looking for suggestions.. I've heard some good things about the Alembic preamp, as well as the BBE-t.. But I don't quite know if those are the best route to go or not.. Any suggestions?