The 40mm size doesn't (to me) change the wonderful balance of the watch at all -- and it's great given the size of your wrist. I particularly like the "all white" combo you chose with the PT case, silver dial, silver numerals and markers -- a great choice. Welcome to the club!
By the way -- any chance of getting a photo or two of the back of the case to see how the 40mm differs from the 38?
Congrats again.
Best,
Gary G