I have two pairs of 70's JBL's I use just for fun: L-166 Horizons, and a pair of huge L-200's. Why not keep the JBL's for when you want to crank up some rock and roll and also look into a pair of very revealing timbre-correct huge soundstage minimonitors like Ensembles, Chario, ect.
I would recommend putting high end jacks on the jbls, replacing the internal wiring.
I would recommend putting high end jacks on the jbls, replacing the internal wiring.