haven't tried those genelecs but the JBL's are great, I hear the newer LSRs are even better :-?

I have tried the Genelecs and found them hyped in the high end. Really crispy sounding. But then, I like the 20/20bas, so you know where I'm coming from.

any reason you're limiting your options to those two? id not rule out other offerings, such as dynaudio bm5a or bm6a's.

me, big fan of genelecs 8000 series...
great gear!, then again whatever bob katz or any of us says, specially when it comes to monitors, try to go out with your fave material on CDs and listen / compare for yourself, if you can...

i am mostly (Not Only!!!) into club / dance electronica... that's why i love genelecs... they have some kind of "PA / Clubsound" character which suits my personel needs... nothing else.