CW-X Pro Tights = AWESOME!
After owning a pair of 3/4 length CW-X expert tights, I decided to give the full length tights a go....and I couldn't be happier. They really do feel good to run in. I don't have any dire injury problems, but I do like the idea these tights could be helping to prevent possible issues arising.
Be careful with sizing....at 5 and ~140lbs I was in between small and medium. I went with the small, and they're snug (which is how they are supposed to be) but I can still get them on without much of a problem.
They're expensive, but a worthwhile investment!