Let's just vote over which game goes next. I've added a poll to the thread, so just pick whichever you want to play. If you don't have a preference and want to play whichever game, just vote for both.
Please don't vote if you don't intend to play, your opinion is completely and utterly uninteresting to us.
But definitely feel welcome to vote if you're unsure whether you're going to make it or not, it's just the votes of those who're definitely not going to play that are pretty pointless.
I'm going to vote Super Mario Bros 3, mostly because I last beat Megaman X this summer, so my desire to play it again so soon isn't especially high. I'll join in on playing Megaman X if it gets picked though.