Looking back at my purchases, IF (and that's a big if) I wasn't doing any video at all, I would've opted for the 16-35L over my 35L. But i absolutely LOVE the 35 L when I shoot videos. Yes, I use it at f/1.4-2.0 for video and it looks gorgeous. As a walk around, on the rare occasion when I switch out my 24-105 for the 35L, I use it at f/1.8-2.0 without flash and it does a decent job, but I'm realizing more and more that primes, awesome as they are, aren't really well suited for my style of shooting. It's a pain to have to switch between my 35 and my 50 when I'm walking around so 90% of the time, I just keep the 24-105 on. This might change as I just got my 70-200 yesterday and have fallen in love with it.
to sum up: I like primes for video shoots when I have time to set up one lens and one shot. Lots of fun playing with manual focus. I'd prefer an f/2.8 zoom for photography and it seems like you're lacking in the wide angle area so I 2nd that notion.
