wide angle lenses question
When I switched from a 1.3x crop camera to a full frame, I went with the 16-35. I love the heck out of that lens. Any distortion, color fringing and perspective correction is corrected in seconds using Photoshop's lens correction/profile. I use this lens for architecture, among other things, and find it satisfactory.
If I was to specialize in architecture, I might opt for the 17mm T/S, but right now the 16-36 offers massive flexibility to shoot everything from landscapes to office portraits.