I just ordered the Carvin PM15's to replace the JBL's for the constantly on the go setup - to reduce weight, and am leaving the JBL's in the house setup I work, for Jams and small (<200 seat) venue we do blues shows at. I have two subs, one stays there unless I need it for a show, both are summed, when we have some for the bigger names there, to increase the ooomph.
using the insert of the Carvin Powered mixer (RX1200L) and crossing over makes the system A LOT more efficient and still keeps it simple so a moron like me can work it.
now I have two separate speaker setups and I can augment them as needed for larger shows, or more needs. For bigger rooms, I added a GX5 for monitors, to increase headroom for 4 of the Carvin PM 12s, a Crest CPX1500 for the Mains and use the internal amp for drum monitors with one of the 15" JBLs so they can get some kick. I kept the amps racked separately to make it easier to move/place them and this has worked out well. no single piece weighs more than 61# (the subs) except that JBL and most are 30-40 +/-.
its all med grade utility level eqpt - not super duper high end etc...... Adding the Carvin PM15s is new. If they perform like the 12's I will be happy. I never intended to make it a all or mostly all carvin setup - it just happened that way - and I have been pleased. YMMV, objects in the mirror, etc.....