HawkOwl, I'm close to your weight and I run 15% less than max pressure in both 23Cs on the roadie, 125 PSI max labeled at 100 PSI. The touring bike's tires are 35C and have a labeled range of 60-80 PSI. Unladen I run 60 PSI while 75 PSI worked well in the rear when loaded (no extra front loading).

These pressures have worked well riding Houston's sometimes less than stellar streets.

Brad