The standard 75b in 40 is pretty good, mine had the best fitting from the factory of any CZ I've had.
Personally I feel the 40b frame handles better than the standard 75b frame, even my .40 RAMI is more comfortable to shoot when it comes to full power 40SW loads.
But... if I saw a good deal on one, I'd probably pick up another.
It is a bummer about the SP01 Tac, if I were to pick only one .40, that would be it.