Originally Posted by Prime Junta 
SoZ borks at least parts of the original campaign, so don't install that at least until the next patch is out. They don't make any (intentional) changes to the OC; they're all included in the patches. I say hold off until you want to actually play them.
I think you're wrong on that one. I seem to remember that MotB included some changes to the camera that made it much better to work with. I never played without MotB installed, but several people mentioned the change to the camera.