Suggestions for integrated amp

No matter which amp you choose, the synergy (match)between the system (particularly the integrated) and the JBL's is really the key. You're probably buying used from Audiogon so there's no way to audition in your system. So it's always a gamble. I had one YBA product in my home (the Audio Refinement Complete). It seemed pretty musical to me too.

It depends on your system and tastes. For me, I would also pick the YBA.

I like the YBA too. All depends on that holy grail of synergy though. Try to audition first.
I have always wondered about those JBL Century speakers. What do they compare to? THey look cool.

Good luck!

I agree with Eldarado .
YBA should be a clear step above MF .

If I had to choose between the two, I would choose YBA. More musical to me.