Haven't heard this exact model but love my Reference Active 20's, and I have seen a few reviews of Paragigm stuff, from the freq resp. plots it looks like they have a "house sound" that many of the speakers exhibit. Very neutral in the midrange, with a few dB bump in the treble at just below 10KHz for air, and a slightly boosted bass for that satisfying thump in your chest. I think there are some old reviews posted at stereophile.com.
I did demo some Paradigm's vs. JM lab a 4-5 years back before I bought the 20's, the models demoed were not as high end as the ones you are considering (I heard the reference studio 80's, and the cobalt 810 or 815, can't remember exactly which)
I listened to the Paradigm's first, and liked them a lot right off the bat, overall very neutral sound with good imaging and full kickin' low end when I was playing Headhunters during the demo.
Then I listened to the JM lab's, these were much leaner in the bass and sounded slightly overdamped in comparison to the Paradigms's, making them a bit unsatisfying for Chameleon off of Headhunters. Not good for rocking out but sounded great on material that required less thump, such as jazz and classical. However, these had an AMAZING high end. Super airy and transparent, really really nice, so nice that it made me like the paradigms less in retrospect.
I left the store with the general impression that the paradigms were a very solid overall speaker, while the JM Lab was a bit more refined and delicate but did not offer the full range performance of the Paradigm.