Ok-here's my quick solo based review, i'll break it down into the different combinations.
Basses used: Ray5-flat on the EQ w/EB Slinky5s, Fender Jazz w/flats-wide open, SansAmp RBI-varied between the book SVT setting and flat-all knobs including blend straight up [except volume of course].
1X15 alone [horn off]
Sounded good to me-before adding [or playing through any 10s] i thought it had good mids and highs. After playing through the 2X10 alone-i realized it was pretty warm sounding and could handle my low notes pretty well [enough to cause enough other objects to vibrate i couldn't tell if it could take the low B open entirely well or not]. Side performance notes-i've played venues ranging from school gyms w/a loud rock trio [guitarist used a marshall half stack] and had to turn down [i had to turn down]. I played our school auditorium/theater and could throw some good bass at least marginally far out from the middle/back of the stage.
2X10 alone [horn off]-i liked how it sounded w/the ray5 best. It was nice and punchy. Loads of mids/highs. Not sure of how it will sound outside of my bedroom. W/the jazz the finger clack and all that noise came through remarkably bright-made me realize how sloppy my technique on that bass has gotten.
2X10+1X15, this was the best sound. The 15 filled in/added nicely where the 2X10 left off. With the 15-it gave the 2X10 far more warmth and sounded really full to my ears.
Once i get a chance to take this rig out in a band setting, outdoors, etc-i'll try and post here again. That's all for the quick review.