Is it "A MF DOOM" or "An MF DOOM"

I was writing a comment and my brain went haywire, I couldn't decide on using A or An before MF DOOM. As in example: - I'll be working on a MF DOOM Mask - Hey an MF DOOM track would be fantastic

I've seen many people use both. I don't want to just use all caps on the man's name but also use proper grammar while I'm at it.