Roccat's usual goofiness and the whole "switching to some sensor I've never heard of" thing have me leery of it, but its shell reminds me a lot of the Razer Diamondback, which remains my favorite shell. I'm a fingertip player, so finding mice that fit me is tough.

Alternatively, I'm thinking of getting shapeways to print me out a custom DA shell (or maybe one for the Puretrack Valor). I'm pretty good with Blender. How does the DA 3.5 track on a QcK? I'd rather not risk killing one of the now kinda rare 3G DAs.