I stopped up at GC today to demo a SABDDI. Sounded *great* through a used G-K 400RB and a 1x15. I bought it. But. They had a SansAmp RBI that they found in the back room yesterday from a canceled special order. I returned the SABDDI, and $263 total later... I still want a SABDDI to sweeten up my own 400RB, but now I'm off and running on building a lightweight rack! Next step: a lightweight power amp. I'm tempted to go minimum weight and pick up a Stewart World 1.2 - single rack space, 11 pounds, 2 X 200W at 8 & 1200W at 4 bridged. I think I can make a small rack that weighs less than 25 pounds total. Wheee!