Lamm 1.2 vs. Pass xa 60.5

Hi George! The Lamm M1.2 can easily drive the OP's 86db sensitive loudspeakers. Don't know about the Pass, but I know the Lamm can because I've heard it do just that to 85db sensitive, highly reactive loudspeakers in a very large room. No problemo!

Any reliability problems with Lamm hybrids or a vicious rumor ?

I just went from XA60.5's to XA100.5's driving my Avalon Eidolons in a 12' x 14' room. Because of the small room, I was thinking I wouldn't hear much of a difference but boy was I in for a surprise.
The xa100.5's took command of the speakers. Better bass control and depth, but the real surprise was the improvement in separation of I instruments and a more 3D soundstage.
Boxing up the xa60.5's this weekend as the xa100.5's are staying :).

I think, the Lamm units in general are very reliable. I never heard - or read - that any amp got a problem...such a "rumor" is unknown for me.

I own Lamm M1.2 monos. Not only are they the closest to live music I've
heard, in terms of amplification (and although I haven't heard them all, I've
had Bryston 9BSTs & 14BSTs, Levinson 33H monos, and a few others), but
I've never had any reliability or performance issues. Moreover, when I first
purchased them, I had them completely checked out my Vlad Lamm
himself. Their customer service is superlative, to say the least. Lamm is my
last stop in both amplification and preamplification (I also am fortunate
enough to own the venerable Lamm L2).