I'd drop this idea that someone can open a book and tell you your ideal bodyweight. You'll need to figure out where you need to be. If you want to gain size, and you just want to look better, a bodybuilder type routine is fine. If you're looking to maximize your strength/power/speed for athleticism as you gain, you'll want to train more carefully. Here's an example of a world-class athlete who did an experiment to gain some mass, and is all go-muscles instead of show-muscles:
RossTraining - Articles If you go to
http://www.rosstraining.com/articles and browse, you'll see a sampling of high-performance training for fighters.
One hint on your background #3 -- 5 reps of 90% 1RM, that's a fine way to work limit strength. But you will see faster gains if, instead of solely working limit strength, you also work power. Power and limit strength are related, and you can and will plateau on limit strength if you don't build up power explicitly alongside it. Power work should be an integral part of the strength program of anyone who wants maximal strength and explosive power. This is why even powerlifters, who are technically doing strictly strength lifts (squat, dead, bench) spend a huge percentage of their time working power, and not just working strength. Obviously, you don't work power at 90% of 1RM. Do you know how to target power?
Also, your goals seem contradictory -- you say you're a "standup type", but for anyone who is serious about competitive boxing or MMA or whatever, gaining weight should be the last thing on your mind. But perhaps you don't want to compete, so you just want to get bigger since you don't care about weightclasses.