New, MapleTree (here) tube is insanely good, new around $600. Talk to Berndt about upgrades if you like. I'd consider this a truly great preamp, no remote option I know of. Don't know about drive current, check into it.
Used, search hard, the Primare remote SS is one of my favs, I think model is Pre30, they've made only one, the same model, for almost 8 years. Phantastic sound.