I have 5d mkii with 35L, 50 1.8 and 135L. Im really happy with my low light abilities. Only thing id change now is swapping the 50mm 1.8 for the 50mm 1.4 or the sigma 85 1.4. And getting a 16-35L zoom for wider, or maybe holding out for a newer rumored version seeing as I dont have much money left for kit atm. 35, 50 and 135 cover a very nice portrait range, id just like wider for lanscape shots and night sky photos.