Narrowing my boat selection down. Has anyone spent any real time on a 550 versus 650 (not interested in a 590)? Thoughts on the rear kitchen of the 550? I know the overall volume of the 650 is a plus and I really like the main stateroom/head of the 650. Anything the L550 has that is better than the L650? Thoughts on the electrical/computer switching system on the 550? Did SR learn anything between 2015 L650 and 2018 L550?