good questions, there is $1500 budgeted for each, though I'd say we get a comfortable$1000 for each. my situation is particular in that for one, the preamp will be played 24/7, and two, it will be played by 20 different people with 20 different basses- active and passive. I don't know how often this means we'll be changing tubes, but I've heard that the tubes in a preamp, as opposed to a tubed head powering a cab, will last longer because they don't get as hot?
we won't be getting a cab cause there's no room for stage volume (right now we're using a pod). it won't be moved, but stationary in a rack, no matter the weight, and as far as the eq, a graphic would be nice, but not necessary- just something for the passive basses to work with, so the tubed di boxes are probably out- at least from the few I've seen had no eq's.