I am not a completist, though there are a few artists where I feel I can say, I've heard it all. The Beatles and Todd Rundgren come to mind. It'd be a real rare find if a song or alternate take should pop up that I hadn't heard before. I thought the same about David Bowie, until the trusty old iPod surprised me again.
The last track on Bowie's 2004 release, "Reality" is "Bring Me The Disco King." I like the track. It's a typically atmospheric, late career, album track with a interesting groove moving it along. But the iPod played a version I honestly didn't know I had. I think that has something to do with it being a remix, which I usually have no use for. But this particular mix by Danny Lohner of Nine Inch Nails, really...uh...nailed it.
Bowie's vocals are upfront and dry. The drums are clean and powerful. It's stripped of excess and yet it is very theatrical. I really love it. It can be found on the soundtrack to "Underworld" and on something called "db Oddities," which I am guessing is a fan made collection that I must have downloaded.
Original above. Remix below.