Beautiful, but just too damned much boat for me.
Too much initial expense.
Too much maintenance expense.
Too much dockage expense.
Too much operating expense.
Too much complexity.
30, maybe 35 feet is where it's at, especially if you actually want to sail the boat. Especially for a single liveaboard. Husband/wife team? Sure, now it makes sense.
I'm not dissing you, it's just my personal preference. Good luck to you.