McIntosh MR78 upgrades?

"I heard the "77" would be more musical sounding than the "78" model (without mods).  Did someone on the forum comared them ? "
Back when these were current models I was a salesman and sold both.  The MR78 was hands down the better tuner overall, but if a person did not live in an area with a lot of multipath, the MR77 worked as well, sounded as good, but not better.  The current modded MR78, however, is just better in every way.  I hate to say best, but in my experience it easily is a match for a properly working Sequerra.

Thanks, cleeds. You obviously know the subject quite well. Nowadays and for about the last 8 to 10 years, most new cars come with the capacity to receive SiriusXM. In my case, I tried SiriusXM in my car, on a lark, and now I am really hooked on it, to the extent that I don’t even try to tune in AM or FM stations, except for one sports station in my area on AM and one PBS station in my area on FM. So I would expect that SiriusXM might be a threat to FM , especially as and where the primary use for FM is to broadcast music with some fidelity. Music and PBS/NPR.

I guess I'm getting into this conversation late. Just sending my MR-78 in for the Modafferi mod. Got his office unit from our kids pediatrician 20 years ago when he retired; he kept the MR-80 he had at home. It has served well, but the quarantine has me listening to more FM. Looking forward to the change. My cousin, a retired Boeing engineer responsible for avionics for the 787 (yes, I used to tease him about Li-batteries), has the MR-74 and we've done a side-by-side comparison. He likes his and I like mine: who can argue with that? I guess we'll do it again when the 78 gets back. The two main stations that I listen to mostly are classical (PBS) ands a distant independent (jazz). I support both and suggest that as an important way to keep FM on the air.