I realize this will probably be of interest to about 5 people but I thought I'd update on the flat search. I ended up getting a pair of Blochs + love them. They are definitely my most comfortable flats [and I've had a lot of flats :] ...
I got the basic black flats. Bloch originated as a handmade ballet shoe maker so I figured they would be comfortable + they are.
ps. I ended up not getting the Marais due to the no return, just exchange policy. With my track record on shoes/flats I figured better safe than sorry.