Hi - Just joined the X club with an X Pro1 and an XT-10 a month ago, plus the 14/2.8, 35/1.4, and now the 60/2.4 primes.
I don't think I will go beyond this set as I bought them to give me a small, handy and "want to use" fun system, as I find my Canon 5D2 and big L glass collection a drag at times.
I'm off to photograph my daughter rowing in competition tomorrow, and I am taking the Canon with a 150-500mm zoom for the rowing itself, plus the XPro and its3 primes for everything else.
Wonderful, magical glass.