I'd spend the little extra and get something already known.
My suggestion would be the Roccat Kone Pure Owl Eye. Top end sensor (based on the 3360), light weight, good shape, good clicks.
Amazon has a listing for $50.03 (sold by them, not a 3rd party).
I've got a roccat leadr, and the build quality blows away anything from corsair (m90, scimitar) and logitech (g900) in my experience