I'm too lazy to cure my own briskets so I always use corned beef. However, I always use flats, not points -- I think they slice up better. I use three parts freshly ground pepper, one part coriander and a few sprinkles of garlic powder and onion powder.
I almost always throw one of these one when I fire up the smoker, just because I love pastrami so much. I slice it as thinly as I can with a sharp knife but I really should get a mandoline to do the trick.