I got a Boss seat for my new pro. It has awsome storage and it's the same weight as stock. And you don't have to buy that bag that you can never get anything in.. All the diff. pockets the boss seat has are very nice and very useful.. I also like the non-slip seat. It is also nice and firm, no saggy butt at the end of the day.
skinz protective gear makes one as well, supposed to be 2 inches taller and 2.5 lbs lighter without the optional bag. the boss looks like the fit and finish winner, but the skinz looks like it takes less room on your tunnel.