People who guided my start in SLR photography, almost a decade ago, had a high regard for the EF 17-40mm f/4L. To this day, if one is shooting stopped-down, to maximize DOF, this lens will get the job done, for its owners.
If anyone has a decent APS-C body, the EF-S 10-22mm lens actually does interiors very well. I realize that this may not apply to the author of the original post, but may be helpful to others, who may read this.
The EF-S 10-22mm has so very little distortion, one does not need to apply much, if any, correction, if one has held the camera level, during the shots. (When my duties included crime scene photography, I was not allowed to apply distortion correction in post-processing, and the original 7D had no capability to apply distortion correction data in-camera, at the time of capture.)
When my EF-S 10-22mm lens partially disassembled itself, after almost seven years of hard use, I no longer had a need for a lens to shoot interiors at wide angles, so have yet to choose an EF-mount zoom, to replace it.
I bought an EF 16-35/2.8L II, while my EF-S 10-22mm was still functioning. When I added a 5Ds R, the weaknesses of this L II became apparent, so I sold or traded it.
