Hello! After gathering up a mint 7082 tuner and 7007 CD player, I'm looking for a preamp with the same basic cosmetics as these two. This brings up the family mentioned above - the C31V, C35, and C37. I know all have remotes, and the C37 has a motorized rotary volume versus up/down push buttons on the C31V and C35. Other than that, are there any real performance differences? Reliability differences? I've seen a few units that mention source selection acting funky on the C31V but it looks to be basically the same setup on all three units. Thanks in advance for any insight on these!