at the moment I'm using a single 4x10 cab with an amp, and im perfectly happy with the tone, and the stage volume its capable of. however (there's always a however) I sometimes wish I had an extra cabinet, just so I had one closer to my ears, we run a fairly quiet stage, and sometimes me pushing the volume so i can hear it can overwhelm everyone else if im too close to the amp. now the obvious solution would be just to get another cabinet, however it's a 4 ohm amp and a 4 ohm cab, so cant do that. the next obvious thing to do is get two 8 ohm cabs and call it a day, but I can't really justify it for the few times I may use it. so I thought why not use a combo amp and put it on top of the cab if needed? fx out of the main amp into the fx return of the combo? also means I get a backup/practice amp in the same package. so just wondering if anyone else has done such a thing, things I should look out for, any issues im unaware of, and any recommendations for combos that might be upto the task? preferably not too expensive, around the cost of a GK extension cab? just for reference the amp I have is a 1001rb.