I'll just throw in my 2 cents here...

Every version has its pros and cons. We're lucky to have a choice depending on what we think is more important.

If you're looking for the most purist version of the theatrical star wars, you'd probably want to look at something based on the 2006 theatrical DVDs. Dark Jedi has done a great job cleaning up the image for his V3 so I would recommend that if you're looking for something more "pure". Unfortunately the laserdisc master used for this version suffers from heavy DVNR (a noise reduction process) that heavily smears the image.

If you're looking for a good looking, high definition image, I would suggest Harmy's de specialized versions. This is basically a "recreation" of the original version using the BluRays or HighDef broadcasts as the main source, and other various sources to fill in the Special Edition additions. While the image quality is light years ahead of the Laserdiscs and exhibits none of the DVNR smear, it's not the original, original version (most of the original SFX composites are not present, frame doubling or slow down is needed to fill in gaps of missing frames, etc)

My personal favorite is the Harmy version since I can't stand the DVNR smear anymore.