My vote's on the ROTJ version. We have at least three ESB versions; Medicom, Hasbro and Marmit. The ROTJ version hasn't been done yet, as far as I know anyway, but I don't know much... As long as they get the colours right, like the back of the helmet.
What I would like to see, however, is some real customer interaction on this one to make sure it's 100% accurate. The PF figure's helmet's the wrong shape, as most people know, and it'd be a real shame if they repeated the error, or some other ghastly error like MR's full scale helmet's angled mandibles. All it would take is a couple of photos, and people say "Yay! Correct!" or "Nay! Do again!". Everybody happy.