There are a LOT of differing versions on here - but don't let that deter you from doing your own set.
A wealth of information on all aspects of creating a dvd set from the laserdiscs is floating around here and the lads who do them are more than happy to take questions and give tips.
It may be an idea to get hold of a couple of the sets that take your interest to see the quality and give you ideas on what has been done.
If you're a Brit then I'd recommend getting a PAL set (ie Moth3r's OT set), although all the others play fine too.
Good luck...