I had very good luck with several Protype BBs on my own bikes too so I'm not sure what happened on the manufacturing side of things. One of the squares was cut so poorly on one of them I was trying to install on a customer's bike that the crank arm would sit crooked on the spindle when tightened down.

At any rate, the OP is obviously looking for fancy over practical. If it were me, I'd use a sealed bearing BB and put the extra money on a better frame.