That's a tough question. Normally I'd recommend something like ProAc monitors and be on my way, but you've got good speakers that obviously do many things you like. In this instance I'd be tempted to try a tubed pre first (since it sounds like you're going down that road anyway) as it may give you just what you're looking for while preserving -- or maybe even improving upon -- the other characteristics you like about the Totems. I'm in a similar situation and a pre I'm strongly considering is an SP14 from Don Sachs. It's getting great customer reviews from audiophiles who have owned other excellent tubed pres, and I think he offers a brief trial period, which would be ideal in your situation. Anyway, FWIW and best of luck.