Ok, I'm about to upgrade my 20+ year old head. I've already replaced my cabs and I am currently running a 1X15 and a 2X10, 8 ohms each, in parallel, mono. The new heads I am considerring can be run in either stereo or mono bridged mode. Would I be better off running mono bridged into my 2 cabs wired in paraleel - 4 ohms efective? Or is it better to run in stereo with one cab on each side?