Zoom flexibility is great, but not as important asaperture flexibilityin my opinion. I would go for the 35L on a cropped sensor.


On a side note I got a 5D Mark II and with the 85mm 1.2L it really is great for portrait (but autofocus is not that great, slow + struggling in low light). I am hardly using my zoom lenses anymore (17-40L, 24-70L, 70-200L IS).


I have to admit it's a question of taste as well.