slikkerias
Super Freak
Best of the best depends really on whether you prefer the original ANH beat up Vader, or the nice and pretty shiny Vader, in which you could chose between the RO or upcoming ESB. If you want shiny, I'd wait for ESB or the eventual ROTJ version. If you prefer original ANH beat up Vader, then as you've read, opinions are all over the place.
I still prefer the original ANH Vader out of the box over this new 2pk Tarkin ANH Vader. The only issue with the original were the way they did the hands. Which you can currently be able to pick up a few parted out hands. This new 2pk one to me has more inaccuracies than the original. If you wan't the best ANH Vader and have the funds, I'd buy both, swap out what you like/don't like, then sell off all the rest of what you don't use.
The interrogation droid is a nice accessory, but not essential. The only issue is the terrible plastic stand...
I might be the only one who actually like the original pleather gloves. some double sided tape could be used to make them stick better to the hands.... I just almost always prefer fabrics to molded parts.