OP- Are you really set on the combo thing?There's some really good power amp/preamp/cabs out there that might get you even farther in the direction you want to go for the same price.
*Slightly edited for less confusion...
+1. Combos can be very cool, but they can always be very limiting.
The whole "recently replaced all the drivers in the cab" thing tends to turn me off...
And moreso if the speakers aren't properly spec'd to work in that box. Slapping anything in there is a bad idea. Would not even think twice about not buying.

POWER and tone shaping are the important considerations. A separate bottom is highly recommended. My personal favorite , and what I use is an ACOUSTIC B600H. Lots of power, inputs for active and passive guitars...not too expensive.
Good luck