I'll second that emotion!
Since my DSLR is permanently attached to a tripod in my studio for the time being, the Canon strap is still in the box.
With my film bodies I used common black cotton web type straps which worked just great for me for more than two decades. What I liked about them besides their width (comfort) is their level of adjustability. With 3 bodies on me, I could strap one around my neck, one across my chest and the 3rd and most used one on my shoulder.
My humble opinion on your three choices:
SLR-CLASSIC: UPstrap Rubber and me don't get along. Even through a shirt, it irritates my skin. The pad doesn't seem that big so if you want to hang your camera from your body a different way from the usual, you have to move it along the strap. If it is too easy to move, it means it would probably move when you don't want it too.