Remember that you can shoot pano with the 24 using the shift function. If what you are shooting is not moving, then you can get some super hi-res photos. Shift the lens to the left & capture an image, then the middle, then the right. Stitch the three together & you've got a stunning image. Since the camera sensor doesn't move, there are no alignment issues. You can do the same in vertical format, shifting up & down rather than left to right. In either format, you can still use the tilt function, as it's on an independent axis and can be rotated separately from the shift mechanism.
I've got the 24mm & it's super sharp!