Interesting thread, and a chance to test my extraordinarily lacking powers of personal observation.
First of all, I'm going to immediately explain why I'm not picking CW, Saph, or LD: The former two are about the same age as me, and the latter is not a whole lot older (a year or two, I think). Looking at myself, I honestly am not even close to being ready to marry anyone (as of right now, I'm not even ready to date seriously, although part of me kind of wants to at least try). Ok, between the other for, Deezer himself admitted he's far from getting married. Generally, most people know themselves better than anyone else knows them, so I'll take his word here. JJ doesn't strike me as being the kind of person who can readily get married either; maybe this view stems from the way he answers reasonable mailbag questions with unfounded insults, and that this is really the only thing I know about his personality.
I am left with MB and DD. I also don't know a lot at all about DD's personality; however, MB strikes me as being the kind of person who, at least, has a personality suitable for getting married sometime in the near future. He reminds me of a not-awkward version of myself in a couple ways. Thus, I vote for MegaByte, David being second, in my mind.
Then again, I'm a horrible judge of character.