George . . .
All good options, however, I would keep the 1911A1.
We both know H&Ks are terrific, but my .45 USP really is too large for comfortable CCW and its reliability and accuracy -- although excellent -- are no better than any of my 1911A1s (Colt, Kimber and a couple Springfields -- but particularly my Springfield TRP).
The CZ 97B is a wonderful .45 ACP -- accurate, built like a bank vault and with great quality. However, it is larger and heavier than a full-sized 1911A1 (and, yes, I understand the 10+1 versus 8+1 capacity difference), which may make concealed carriage problematic -- and I know this will be a primary CCW weapon for you.
Therefore, all things considered, have a well-qualified smith make whatever minor "tweaks" the 1911A1 requires -- if any -- and carry it with confidence.