The Echo stuff rocks, one major difference between it and the Firebox....Firebox has local control over cans/mains volume. The Echo DOES NOT. Local or software. It seems that many companies dont offer this, and I dont know why. If you are not recording miked sources, then this wont be a problem. If you are, you will be needing some type of in-line attenuator, between the speakers and the outs of the breakout box.
I liked the sound of the Firebox when I had it. Like Warren said, again, "You couldnt blame either of these for a bad mix"
I think this needs to be a GS Anthem set to music at some point....