Which set you wish to buy can depend on a few things - like your budget, or which box set art appeals to you? Do you want the best picture quality, or sound options, or simply what is generally perceived to be the best all round set?
Do you have a laserdisc player that is capable of playing discs from differnet regions, ie from Japan or PAL (if you are US based)?
There are a few ‘laserdisc to DVD’ preservation projects on here in the Star Wars Preservation section of the site, the Index pinned at the top of the section had many of them listed. It also has links to detailed info on each laserdisc set - audio/video information and some ‘pros & cons’ too, and is well worth a read.