Okay, Dave and I finally got around to taking my rig to his practice space, and setting up my Aguilar DB750 and Alembic SF-2 Superfilter and 2 GS 112 cabs against my Aguilar DB750 and Alembic, and Dave's Aguilar GS212. It looked a lot like this: We used my MIA 75 Jazz w/JRetro and Fralins, my US Curbow Petite 5 string w TI Jazz Flats, and Dave's magic Reverend 4. We also left the bass and treble boosts on, and the tone knobs set at 5. Both setups sounded great. The only real difference are the exact ones you would think--the 2 112s were louder since they were pushing a 4 ohm load vs the 212 with an 8 ohm load. The 112s had a slightly deeper bottom (again, probably attributed to a 4 ohm load). In the end, I think we both got the perfect setup for our styles. Dave plays louder stuff than I do, for the most part, so having the option of running only GS112 will suit me when I play a quieter gig. But, having the second 112 cab gives me the option to induce vomiting by sheer volume--I actually made the fillings in my teeth rattle with the gain on 3 with two 112s running at 4 ohms. Dave, OTOH, would never really benefit from the more modular setup, and he benefits by getting casters on his GS212. I think if we had used a 4 ohm GS212, it would have been difficult to tell which setup was which. If anyone feels compelled to ship us a 4 ohm GS212, we'll be happy to lug my stuff back over there for a more thorough comparision.