the pam reps look very much like the gen. i have a 40mm gen
pam and a rep 40mm pam chrono. the layout is the same.
believe me- the 40mm is big enough, i have about a 71/2 inch wrist,
but i'm only about 5'7''. i usually won't go bigger than 42mm.
the actual size isn't everything- some watches wear bigger than others.
for example- i got the new Tag Grand Carrera and its 43mm but seems like 50!
on the other hand- i have an explorer2 thats 40mm but seems like 37.