Well, aftere tonight (I used the 115 and tweeter, 330 watts) I am about ready to get a 1,00 watt power amp, preamp and 2 big cabs. It was guitar, drums and me and I was burried. Thankfully I had my DI so I could get some help from the PA. I am tired of maxing my amps. We are obviously not as quiet a band as I thought.
Steve,
Have you asked about demoing the GB rig?!?!??????????? I want an answer!!!!

Just kidding, sorta. haha
Honestly, even if you don't think it's the sound for you, it might give you an idea of what a mid-sized cabinet and head would sound like in terms of volume. If not the GB rig, is there something else there that you could demo at a gig? I wouldn't go out and fill up a big rack case with all kinds of separates because of a power issue. I don't think you need a big preamp, power amp, and all that other stuff. Moving a big rack case around like that would get old very quickly.
Didn't you like the Eden tone? Go get a wt800 and pair it with something. The new "b" models are something like 1100 watts at 4 ohms. That will be huge with the right cab, and it's only 2 spaces in a rack. A friend of mine here on the forum (slapagroov) stayed at my house last night on his way through town. He had his old wt800a with him, and we did lots of comparisons with my GBE 1200 and Neo-pak. That wt800 just freakin' slams. Lot's of power, great tone, and that classic Eden buttery tone. We put it on my NeoX 212 and it just sounded awesome, even though it was only doing 400 watts unbridged (the 'a' model won't bridge at 4 ohms). If you could get your hands on a 'b' and pair it with a 4 ohm 212 I can't see how you wouldn't have enough volume. When I put 1000 watts into that 212 with my GBE it is huge sounding. I wouldn't have any problem in the setting you just described. If I even thought it would be a problem, I would put the 112 on top to get nearly 1200 watts at 2.66 ohms, and the stack is so tall it projects very easily.
Example: I've used that exact rig (GBE 1200, 212, 112) outdoors with no PA support for bass (everyone else was in the PA, though). We had a loud drummer, two guitarists and keyboard player. Before we started, I boosted the lows a bit thinking it would be needed without having PA support, and turned up louder than I normally would. During sound checks, the sound guy had to keep asking me to turn down. I wound up running the thing at about half of what the 1200 is capable of, and got nothing but kudos for the sound afterward.
I say that just for this. Sometimes in this day and age we get jaded about wattage numbers. There are so many heads out there with 1000+ watts that it just sounds common and no big deal. But that's a lot of power, and if you have the right cabinets, man you can do a lot with 500-750 watts. I could have done that show with the GBE 600 and been completely fine since I had 3 twelves to move a lot of air.