Look at this video to see relative hiss.Have you bought the JBL or the Adam? I guess the latter - I got the JBL and the idle hiss is quite noticeable (until the standby kicks in, which allegedly only the CE labeled version has). At very close distance (<1,5m) the idle noise would be a bit annoying to me.
I also have a video on the Kali hiss which they have since fixed.
My Kali IN-8 v2 set is as quiet as my Genelec 8260.
Until JBL improves something or releases a coaxial, I'd see if the Kali v2 speakers would work for you. Especially if you can stretch and get the IN-5 which would work as a center channel should you expand.