You mentioned you are shooting architectural subjects. In that case, you will want to lean towards shifting and stitching, rather than the pan technique. Panning will cause straight lines to bow across the stitched frames, as the lens and sensor change their relationship to those lines in each frame. Shifting will keep the lines continuous through the frames, requiring much less post-prod juggling.
That is not the case if a pano head is properlly used and planar projection applied in the stitching application.
The following image is a good example, the image is 180 megapixels and was shot with a Zeiss 100mm lens on a Nikon D3x, pano head from Really right Stuff and stitching done in PTgui (if I recall correctly). Note that the bridges are perfectly straight (they are the only straight item in this building).