think i might have decided how to handle home/small gig/big gig challenge. 2 small/medium sized amps i can mix and match. They will each be combos in the same size cabs. use amp 1 for practice/ small gig. Add 2nd for big gig. Place together or spread apart. They will be slightly different sounding, but can be set to sound similar. For people who use 2 amps, apart from phase issues, any other considerations?