RE: Profiles and snaps
These guys are right on, in my opinion. Fat airfoils that lend themselves to the low and super slow 3D-batics don't usually make good snappers. And pretty much the same goes for tumbles.
Another snappable profiles (tumblable) might be the Copperhead Aviation Woody, OMP Boxxer, EF Chinn Yakk, Swany Primo, and the Sabre 48 from Spaz.