Thanks for mentioning! I guess the bonus content differs slightly in the Xbox and GameCube versions. The latter one is missing the arranged soundtrack option in the anniversary collection. I guess they are also not as cheap to come by as the pretty common PS2 versions, are they?
I have been playing MMX1 at the first time on last Friday. Very tough ride after the intro stage, until you're able to find the dash and armor upgrades. I'm more familiar with the NES titles, where I like 2, 3 and 4 the most. Trying to get through 1 as well, but oh boy, the Ice Man stage isn't fun in the last part where you have to hop on top of moving platforms. Get shot and you'll be glitching through them towards the bottomless pit underneath.
GeminiLaser's Mega Man playthroughs on Youtube are very entertaining. Usually I can't stand let's Plays, but he's the one I like to watch and listen to when he is showing off some jaw-dropping skills. I want him to marry me.