I just acquired a 900 watt (yes, the old 900 watt) M9 Carbine head from a fellow TB'er, and now I'm wanting to pair it with transportable Mesa cabs (so no 6x10, 8x10, 4x12, or 2x15). I was thinking of going the Traditional Powerhouse 4x10 and 2x10 route, but what about mixing cabs and going the...