SW Calgary Pizza
I had an absolutely fabulous pizza a couple of years ago in a neighbourhood strip mall joint in Lakeview, and I've heard other people mention it as worthy of a long detour. I think, based on my hazy recollection and Google Maps, that it's Bella Roma; 17-6449 Crowchild Trail SW (403) 242-0441.
Don't know if they deliver, but if the mountain won't come to Mohammed...
I would recommend Sophie's Pizza, it is on Richmond Road in the strip mall next to the Co-op. It is run by the former owners of Spiros's on 17th Ave and 33 ST SW, which is also a good choice. 3rd option is Nick's they have a delivery/ take out joint on 14 ST around 33 ST SW.