I am a die hard fan of the CTS, specially with the SP01 frame. If i recall correctly, it weighs about 100gm (3 oz approx) more than a SP01 Shadow. The TSO, with fill wide dust cover, is heavier still.
You could look at one built on either the SP01 Shadow frame, or the Shadow frame.
If you want to keep the weight down, then the standard cz75 SA frame is the better option. I am not sure of the weight, but it should be no heavier than a standard SP01 Shadow.
CZC offerings, such as the bull shadow, bull shadow 2, A01 etc are excellent, but also heavier.
I would opt for the accu bushing on the CTS.
I shoot mostly my CTS, based on SP01 Shadow frame, converted to SAO. It has exceptional balance and accuracy.