One of my rigs is a 1001RB II and a 700RB combo that I stack. I connect the 1001RB II efx send into the 700rb return. This allows me to just use the 100rb Eq for the whole rig. With the RB amps, I still have control over the boost, woofer and tweeter levels on both amps. I only need one DI for the whole rig, not to mention I have a backup amp, each combo is on wheels with a handle, and I can still run a pair of 8 ohm cabs in the future. I also hang a primary and backup bass on it with hangers. It's a little tall for what is really just a 4x10 cab, but my setup time is fast and it's loud and modular. Works for me most of the time.
Wes