musicman, sounds like an awesome rig, but you really need to read my thread on vertical stacking of cabinets. The low-end coupling factor by putting both cabs on the floor isn't reduced in any way by stacking one cab on top of the other, plus you will get a much truer representation of your sound to the audience because you'll have a cab closer to ear level. The only thing putting both cabs on the floor does is cause you to strain to hear it the right way. You may think you're hearing it plain as day, but the audience is hearing something completely different from you, especially if you stand close to it. It's just like modern day stereo systems with subwoofers...put a sub on the floor, and two small satellite speakers in the air, and you hear full-range sound everywhere you go in the room. Try it...stack the combo on top of the Avatar so the combo's at ear level. I guarantee that you'll hear it just as the audience does with no loss of low end.
I get a much better sound with my LMKII and my two Berg 112's when they're next to each other on the floor. I don't like them stacked as much. The sound next to each other really carries through the room more. I talked to Janek Gwizdala once when he used my rig and he commented on the same thing.
