Take that original DX7 with the 10 cartridges already!
Don't lose more time asking!
The DX7 mkII is very nice, but the really "cult" one is the original.

I plan to buy the II as soon as I find one in perfect condition, as I have a soft spot for anything FM. I already have a ton of FM synths, but I still think on the original there is a "vibe" about it. And it has the best looks of course!