Seem to be hearing more than a few problems with the Edelbrock shocks, such as leaking or wearing out prematurely. If I were in the market for some new shocks (I'm not), I'd have trouble buying something that a number of users are saying they're having a problem with. Shocks are simple devices. I know they have a lifetime warranty, but I wouldn't want the hassle. Too many other good options out there.
I, like many, use the Rancho 9000 manually adjustable shock, and am completely satisfied. Modified rigs use 9000's more than any other shock, in my view. They also make the RSX, which is a auto adjusting shock similar in application to the Edelbrocks. Other options are the Monroe Reflex, Trailmaster SSV, etc.
Just because Edelbrock spent a zillion dollars on advertising their product, doesn't necessarily mean that it's the best. I'll admit that I've never personally used them, and now that I see reports from those who are less than satisfied, I'm glad I didn't (although I don't know if they make them for lifted rigs).