McIntosh MR78 upgrades?


I have an MR78 that's working well. 

I can bring it to Audio Classics, and for about a grand, get the power supply and audio section upgraded, and the tuner will be aligned. 

There's another shop, maybe 2 hrs from Audio Classics that does a power supply upgrade for $250, plus an alignment would be billed based on actual time on the bench. So let's say $350-$400. 

Is the audio section upgrade worth $600? Would be most interested to hear from people with Mac tuners that have had them modernized. 
128x128zavato
I have only heard my MR 78 with the mod as I purchased it with it.  I would not even have considered one without.  My tuner sounds amazing.    As good as vinyl or tape.
This is an easy question. Send it to Audio Classic for the Richard Modafferi modification. Well worth the money, plus unlike other modifications, this will add value to your MR78
I picked up my MR71 for peanuts in the early nineties and cosmetically it happened to be excellent. The electronics were not good. I had the Modaferri mod done with the alignment, and it sounded great after that. Later, I sent it to Sam Kim in Montreal, and he worked his magic on it. After that, I no longer craved for the coveted Marantz 10b.

A few more thoughts about this. Does the tuner equal my vinyl front end? No way. And, I do have concerns that FM may be on its way out. Plus, I moved into a new home, and now need to do the roof antenna reinstallation. Right now, my tuner sits on my rack looking pretty, while I'm trying to figure out how to fund other needed system improvements.

Still, I'm driven to get this all done, because that's what it's about for me. So, yes, the expense was worth the results.
Kenny
I disfavor mods in general, but the Modafferi MR78 one is different. Richard was heavily involved in the design of the RF sections of the tuner, and his mod of the 78 is more like an update, he putting everything he has learned about tuners in the intervening years into your 78. He also installs new, better RCA jacks, adjusts and aligns everything, and includes performance test results of your particular tuner.
Kenny - FM definitely on the way out  I have a roof antenna and a signal sleuth and I only get 2 stations (I am 60 miles east of NYC so college stations for me). But, they do sound marvelous.