Mike,
I just went in and counted 64 shirts, including five long sleevers (some logoed for the Dallas Stars) and the dozen or so I got at my last grand opening. And when I moved into my new, smaller place, I donated nearly 50 to good will.
I am wearing a Nike high tech dri fit shirt right now, and it does seem to work in our 100 degree heat. I preferred Cutter and Buck, but doubt I will buy cotton again. I don't know which of the new brands I will like best.
My shirts make it longer than yours, but some of the 64 are relegated to errand duty. The oldest came from my Ireland Trip in 2000. My policy is to only where shirts from my own courses or from Dead Guys. My collection includes one from UofMichigan, PV, Baltusrol, a few Irish courses, Oakmont, Oakland Hills, and of course, Cowboys, Colbert Hills, Sand Creek Station, Quarry, Legend, Wilderness, Indian Creek, Tangleridge, Ridgeview Ranch, etc.