Thanks everyone for your advice.
Unfortunately, its now a moot point. I got carried away this morning playing along with a Van Halen song

and managed to blow the speaker in the Acoustic 260 mini cab

. So I ran all the effects into the BDDI and then into the G-K MB210 Combo. Now the sound is markerdly better than running the 2 amps so I'm not going to fix or replace the Acoustic.
Stock, the MB210 puts out 350w into the two 10" speakers. I may add a second cab which would then draw 500w from the amp.
In any event, I no longer need another pre/DI so maybe I'll look arounf for a one-off hand painted Devi Ever pedal.
