IF it we me (and certainly, YOUR results may vary)
First, the standard answer: Hard to go wrong with a Jazz, and I find in playing with box guitars, some 'back pickup' added into the mix puts you in good stead to speak up if they're doing a lot of fingerpicking.
Having said that, of the others on your list, in terms of what they'd do for me:
The Spector Rebop. No.
The Warwick. The dirty little secret about Warwicks are that they're sort of a one-way street, you can go down it, but you can't turn around if you decide you don't like them. The African woods are either a 'yes' or 'no' proposition in that with the African darkwood bodies (Bubinga, etc.), they 1) impose a certain sonic signature you may or may not like, and 2) they can get RealHeavy RealFast. Next . . . . . .
For me, the Spector Euro4 would be the ticket. The body design by Ned Steinberger is an ergonomic wonder (barely a square corner on it anywhere), and with the all white wood body recipe (with the ebony fingerboard), it would have that sound that would alternately sit or cut through an acoustic setting. People rag EMG's, but they're deadly silent, and their basic tone is easy to tweak to get where you want. The Czech build quality is exceptional, and I'd shoot for an older one that had the one-piece wings instead of current practice where they're putting a pretty cap on the wings over a more basic wood for a cost-cutting measure. The 4's are 34", and the fives / sixes are 35" scale.
My question is the 'alt-tuned' part you mention: If they're detuned a lot, I'd get a five so I could skip a lot of re- or de-tuning.
Best of Luck !
First, the standard answer: Hard to go wrong with a Jazz, and I find in playing with box guitars, some 'back pickup' added into the mix puts you in good stead to speak up if they're doing a lot of fingerpicking.
Having said that, of the others on your list, in terms of what they'd do for me:
The Spector Rebop. No.
The Warwick. The dirty little secret about Warwicks are that they're sort of a one-way street, you can go down it, but you can't turn around if you decide you don't like them. The African woods are either a 'yes' or 'no' proposition in that with the African darkwood bodies (Bubinga, etc.), they 1) impose a certain sonic signature you may or may not like, and 2) they can get RealHeavy RealFast. Next . . . . . .
For me, the Spector Euro4 would be the ticket. The body design by Ned Steinberger is an ergonomic wonder (barely a square corner on it anywhere), and with the all white wood body recipe (with the ebony fingerboard), it would have that sound that would alternately sit or cut through an acoustic setting. People rag EMG's, but they're deadly silent, and their basic tone is easy to tweak to get where you want. The Czech build quality is exceptional, and I'd shoot for an older one that had the one-piece wings instead of current practice where they're putting a pretty cap on the wings over a more basic wood for a cost-cutting measure. The 4's are 34", and the fives / sixes are 35" scale.
My question is the 'alt-tuned' part you mention: If they're detuned a lot, I'd get a five so I could skip a lot of re- or de-tuning.
Best of Luck !