Trying to determine which site is the best to sign up for.   p411  or date check or there others?

a lot depends on your location, they each have their advantages, and yes there are others (RS2K?)

do a search on this board, there have been several discussions, and people who know more about it than me.

OK, there are regional differences, and certain sites might be better in certain markets. (for example rs2k is good in Chicago) There are also price differences, and p411 recently had a 45% price increase, and they don't have the lifetime membership option like date check. That being said, in my opinion p411 is much better than date-check. See the link below for one of many prior threads on the subject. You will also see many providers prefer p411.