I've been doing about 2 or 3 pastramis every few weeks and my favorite pastrami rub is 2/3 Plowboys Bovine Bold & 1/3 course ground black pepper. As for the brining I can't help because I use corned beef points.
CBJ # 22569
KCBS BoD Judges' Advocate
Member of the 100 Contest Club
Possibly the only judge ever to get an award from a bunch of cooks
UDS 075 UCB WSM and a bunch of other stuff.
The above post is only my opinion - mine & mine alone.