I am trying to decide between a 9mm Sig 226 and a CZ 75 B. If not for the $$$ the Sig would be my choice but for half the price I like the CZ as well. The big thing the Sig has over the CZ I like is the trigger. Shorter, lighter and just feels better. Is this something that can be upgraded with the CZ along with the sights. If so how much would it cost. Thanks in advance.