Or used MDA or bust

.
You can use the extra $2500 toward a pair of MC501s.
Assuming you can get $2700 for the MC252 (very doable - I did it) and you could get a pair of MC501s for $5500 (very doable - I did) - you are only $300 shy from having the following set-up:
MVP861 (trasport) -> MDA1000 -> C220 -> MC501s
vs.
MCD500 -> C220 -> MC252
Which one would you rather have?
Nothing against the MCD500 or the MC252; and you would be dealing with used vs new. You would also have 2 extra "boxes" (add DAC and add an amp) I just want to make sure you are exploring and considering all options.
I had to be patient, and ready, for the opportunity to get used MDA1000 and MC501s locally (I would hesitate to buy something like this without a face to face transaction), but I am glad I waited and was patient. I love my MDA1000 and MC501s.
Alberto