I considered many of these.... I'll tell you why I got the DV-50.
Linn Unidisk 1.1 ??? TOO Expensive...I have an all Linn system, and wouldn't get it!
Classe CD/DVD1 - no progressive video output. Sorry, no sale
Muse...tricky, I almost went with this one, but you must make sure you get the Gen 4 if you want to play CDR's, and progressive output is an option, so not on all the used ones you will find. I don't think it does MP3's either.
Arcam...could find it to listen to, have heard great things about it but...
As for Mc...wouldn't get them for s front end unsless you want all Mc...just my thoughts, looks too dated in any other system.
The DV-50 does EVERY format, and all well. That did it for me.