JBL S3900 and S4700....possibly audiophile or not?

Hello everybody, I have a system so composed:

TT Rega RP8/RB800/Apheta VDH recabled (arm)
pre-phono Heed Quasar
CD Rega Jupiter+Dac Io modified
Pre Pass Labs X1
Amp Nakamichi PA 7E VDH recabled
Speakers Epos ES 14 VDH recabled/WBT conn
cables Nordost, Linn, Klimo Reference, VDH,
power conditioner self built, 1KW
granite everywhere


I 'd like to change speakers, and I'm trying to understand if the two JBL could be "boomy" and "treble aggressive" or...what? Obviously the listening room is crucial, but another point is the speaker "tone balance".
They are not easy to listen to here in Italy.... 
A japanese dealer which I was in touch said: instead buying these two you should listen to Wilson Watt Puppy/6...better coherence all over the audio spectrum....
Anyway JBL is for me an old dream.
Does someone own/listened to the two JBL? 
Sorry for my english, hope is clear enough... Now waiting for your experience.
Thank you in advance and best regards!
Alessandro Vigna