We started with just the name X100 and for the (S)econd model Fuji chose X100S. In the same vein the (T)hird and (F)ourth models were the X100T and the X100F. Assuming there will be a (F)ifth model it can't be another X100F and the (S)sixth and (S)eventh models will be problematic too. I suspect Fuji will use Roman numerals as the X100V, X100VI etc. What do you think and what feature(s) would you want in the V?