I would definitely try out the BOSE before getting rid of the JBLs ...
Last night a worked a gig for another OMB ... he has a steady Fri/Sat gig and leaves a lot of his equipment there, including a BOSE L1 with the sub ... I have used this system several times with my technics KN6000 and it sounded AWESOME ... last night with the KORG Pa600 the piano sounded 'thin' and 'tinny' ... I was going through his mixer as well, so I was able to make some adjustments, but if I used that BOSE as my system, I would have to really make some EQ adjustments ...
of course the other attributes of the BOSE - the ability to cover a long, thin room jammed with people - shown through and overall the gig was good ...