I have roller reefing headsails and main. The investment is well worth it. I have little girl who is turning 5 years old this month and I am happy to stay in the cockpit. The main is the CDI on mast system. For trailering it's a bit cumbersome but not impossible. Mike Inmon at http://www.macgregorsailboats.com/ has roller boom system that might be easier as I imagine the whole rig can come off and be stored down below for trailering. Someone else mentioned BWY. Also, the there will be less weight higher up. That said, I still am happy with mine. I recently rented a sailboat without a furling main in Florida and bitched about it the whole time. I am spoiled now.
I already had a 5 gal porta-potty but would probably have gone with the composting head if I had known about it when I bought my boat but so far the 5 gals has been plenty. I also have a pump-out kit so I don't have to deal with hauling that out.
For your height with and M model, you might want to remove the bathroom door and replace it with a curtain. It can be tough maneuvering. The rest of the boat has lots of room except for height in the berths where you will have to stick to horizontal positions if you are having a romantic cruise with the wife....
Rob



