The sound I have in my head has some tube "warmth" to it, particularly in the low end. I don't want scooped mids though (at least not "baked in"...I'd rather have that as on option I can switch on if/when needed than something that's on by default and I have to work around). I think this is a counterintuitive goal when I'm also referring to the Alembic pres because my understanding is that the Fender tone stack has the mids scooped by default (when the EQ controls are all at noon, at least). Phil Lesh's tone in the mid- to early-70s has exactly the warm low end (and mids, for that matter) I have in mind, though, which is what makes Alembic my point of reference. I'll likely never try to copy his tone, though, because I'm more of a rounds and fingers guy than flats and pick.
So I guess the bottom line is that I want warm, but not boomy, lows and I assume some sort of tube pre is the way to get there, but if that's possible with solid state all the better. Also I think I'd want it in pedal form so I'd have the option of running it with a crossover to send the highs through different effects.