Nice setup! I would be worried about the TT up there in earthquake prone CA but hopefully your ground is a bit more stable than here.
I haven't heard the L65 with a Yamaha amp or ever but I wouldn't doubt that it would be a good match. Do you have a chance to try before purchase?
Yamaha and JBL are a match made in heaven.
They do like lots of power, even though the L65a is only "rated" for 75W, you need that extra overhead to avoid clipping. I think the M4 should do fine.
I drove a set of L112 with an M4 for 20 years, still have some of both here.
i need more shots of the feet.
Great, mint looking system @Gustav80swe