I owned the MR-78 and really enjoyed the sound. However, the tuner inmy Sansui 9090db receiver is so far superior that it's laughable. (Yes the Mac was properly aligned and serviced by Mac) (which by the way is the best service I've ever received from
any manufacturer)
The main reason I bought the Mac tuner was to go with my C-29, and MC-2300. So, if you must have a Mac then I would imagine that it's a matter of what looks and sounds best to you. Even though the 78 has a stellar reputation as macs best tuner, I own several who would argue that the 71 is superior.
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