You'll get different answers from different contributors, but I think you should stay away from the "sell the rights" options and enable the others. Some people who sell prints themselves (via Cafe Press, Zazzle, FAA, et) prefer not to sell the P-EL, but I do offer that option as I haven't seen any clear evidence I'm competing with myself (I think it's perhaps bricks & mortar stores using these licenses, but I can't know for sure)