TS-E 17 would probably be awesome to have, dunno, I've never used one but I've heard the IQ of the TS-E lenses are other-worldly. Although I'm quite content to do tilt-shift effects in post while keeping auto-focus, I understand why they are essential to certain professions. And yes I have seen the difference between 14mm and 16mm on full-frame, it's reasonable. 14-24 would be a decent bit bigger than the difference between a hypothetical 16-24 range and no where near the difference between 16 through 35. If 14-24 works for you, I have no argument to that and if you told me it was for full-time interior architectural shots it would make more sense then if you told me you were a photo-journalist. All of these lenses (even some of the better EF-S lenses) take amazing pictures, and with that, the most important thing is to find the right combination of lenses to suit your use. Personally, I would take a 16-35 over a 14-24 for zooms, because at that point, I'd just assume switch to primes and walk around with a 14mm Prime and a 35mm Prime and use my feet for everything in between while enjoying the full 2 stops benefits of f/1.4 over f/2.8 when the wider angle isn't needed. 14-24 isn't useful enough to justify losing the 2 stops for me, but the near three primes in one lens range of the 16-35 is worth that trade for me.