I guess your lens choice depends greatly on the type of weddings that you will be photographing and the aproach that you are taking. I'm a UK wedding photographer and I shoot with available light (no flashes). I tend to use zooms in the summer, but fast primes in the winter where it's generally a lot darker. On a sunny day, I'll choose a 24-70/2.8 L on one 5DII and a 135L on my other 5DII. In winter or during a ceremony with less light, I'll choose a 35 f1.4 L and an 85mm f1.2 IIL combo or a 24 f1.4 II L and a 50 f1.2 L combo, depending on the size of the venue.