Thanks a bunch for all the detailed reviews!
It sounds like from the consensus opinion (so far under non-ideal conditions) that the Qualia's exhibit the kind of sound I dislike-- namely "airy". Not in the good sense of the term "airy", but in the bad sense of "airy-fairy", "floaty", "insubstantial", and "ghostly". Non-present sound with no "there" there. Polite to a fault...
I think this is a common characteristic of open phones. I believe that for me, I just don't dig the open phone sound. All my favorite headphones have been closed, though given the small sample size this could very well be coincidence. Unfortunately (IMO), Sennheiser has made being "open" a buying criteria by advertising the alleged wonders of their "open-aire" design. People seem to want that airy-fairy sound, but it just doesn't appeal to me.
You all have given me less reason to secretly lust for the Qualias, and for that, my R10s, and especially my wallet are grateful!