Are there any medium to large sized dogs that are good for allergy sufferers?

[Dick Cancer]

(Don't shed much)? My wife and I are about to move out of our apartment and into a house. (Hooray!)
The neighborhood is decent, but I would like to keep a dog for protection, and for when we are not home.
The problem is, I am allergic to pet dander. I am not one of those people that starts sneezing immediately when pets are around, but if I pet or handle a dog or cat, then touch my eyes, etc, I always end up with a stuffy nose, watery itchy eyes, etc.
My mom had a Shih-Tzu for many years, and it never bothered me a bit. I know that "hair dogs" are OK for me, but a Shih-Tzu isn't going to scare any burglars away.
I also would prefer if it *wasn't* one of those stupid curly sheepdog lookin' dogs, which seems to be the only "non-allergic" breeds of size I can find with my internet searches.
Any suggestions?