Ok so straight up I can't speak to the differences between the Musical Fidelity and NAD amps because I haven't directly compared any of them. I know the 3050 is very well regarded by both members on here and reviewers in general so I don't think you can go wrong there. It really depends on how much you feel you need to replace all your other boxes in order to house them in one place. The NAD M10V3 has a lot going on in terms of its basically an all in one system which can be handy for reducing the amount of boxes you've got doing things in your system, but also won't necessarily sound better than a bunch of decent separates doing the same thing (and will also go obsolete much faster than a dedicated 2 channel amp like the 3050). It's also nearly double the price. However with the optional bluos module installed the 3050 has similar functionality minus I think the video input featured on the M10. I would obviously TRY to listen to a few of those amps somewhere before you buy. Or perhaps if you can't do that maybe you can demo from somewhere with a 30 day return policy.
Our own
@Ed Selley loved the M10 V1. Gave it a 10 out of 10 on AV forum for what it's worth. So I don't think you can go wrong there assuming they didn't bork anything up in the newer hardware revision.
In terms of Dirac, yes this will absolutely without a doubt make a big difference in challenging rooms and if it's lined up properly it will not sound digital in any way. It works so well in fact that I've been using it in my main system through a goddamn 8 year old AVR since 2016 and it's the only part of my system I haven't replaced yet. Which is bonkers because my cart now costs more than my amp, but Dirac does such a good job regulating my room that it's very hard for me to part with it. You have minute control over every aspect of the sound and can make changes anywhere along the spectrum to raise or lower entire sections of the frequency curve all the way down to individual frequencies. You can also easily disable it through the amp if you want to go full analogue, I would assume this feature is available on most all amps is installed on. When running in my system it basically feels like the walls and windows in my space have been removed and all I'm getting is pure music expanding out in every direction. The stage is massive on good pressings. The music will start about 15 feet behind my speakers somewhere in my neighbors front yard and will expand in a dome over my house and end somewhere in my other neighbors back yard behind me. The music comes at me from every direction. I know that sounds insane but it really does make that much of a difference in challenging rooms.
Now the caveat here is its not the most user friendly of systems to use so it takes some practice to really know the ins and outs of it. However they have really improved functionality over the past few years so it's a lot easier to use for the average person than it was 8 years ago. I mean hell if
@Nee Lewman can figure it out you should be fine.
KIDDING! LOVE YA PAL
No but seriously he did it you'll be fine.
Lemme know if you have any other questions about it that I can help with.
Cheers