The 2008 DVD set is the most authentic experience in my opinion. The main problem is that it's a 4:3 with a 2.35:1 film in the middle of it. This leads to some serious viewing problems for people who don't understand what they're looking at.
When that squarish 4:3 window pops up on someones big 16:9 HD TV, they usually press some setting that stretches it end to end, this makes it wider than its supposed to be, and to top off the horror show, most tv's come with a setting broadly called "smooth motion" pre-activated. This basically creates extra frames which muddy up the image and make it look strange when you're dealing with such a low res source.
I've been thinking about capturing it, up-sampling it to 1080p, apply a little sharpening, then re-export it in a 16:9 window. That would be the best way, barring an official BLU-RAY or a 4K scan of an original print (which I hear exists for ANH but I'm not privy to the circles in which it's shared).