adjustable vs non-adjustable lower control arms, few questions?

I am looking to get the Spohn lower control arms for my rear end. Is adjustable lower control arms better for the strip in anyway? This is street driven and I thought I read that the adjustable ones can damage due to dirt getting into them, is this true? If I go with the NON-adjustable control arms will I have much bind up on the street if I am not road racing? Also when it does bind up is it doing any damage? Thanks for any help.

The adjustable arms allow you to square the rear end if it is out of square. I am assuming you are talking about rod ends when you say dirt damaging the adjustable arms. Rod ends are considered a wear item and will wear out in time. There are other options in lower control arms you can use which give you polyurethane on both ends without the bind. This is a good write-up to explain what is happening in the back.

http://www.camaroz28.com/articles/jmbushing/

Damn, that looks nice! I might replace my Granatelli(poly-poly) with those.