Yes, I know this is like asking if one prefers apples or scallops.

As I stated in the UWA lens thread, looking over my library less than 15% of my 16-35/2.8 shots are wider than f/4, and many of those are of static subjects where 3-4 stops of IS would be of more benefit than the extra stop of light. Accordingly, I just sold my 16-35mm f/2.8L II, and I had planned on ordering the 16-35mm f/4L IS to replace it. But I got to thinking... Most of my shots with the 16-35/2.8 are of buildings or landscapes and are from a tripod; only a few shots have people in them, and those were generally opportunistic photos where the 16-35 was already on the camera, but 24mm would have been wide enough.

Granted, the TS-E 17mm is significantly more expensive, but ignoring that, I find myself thinking the TS-E 17mm would be a better choice for me. Anyone want to talk me out of it?