D30 ball joints?

I need to replace my ball joints again in the D30 and was wondering if there is any difference in some of the manufacturers. I currently have the Moog joints in now and got about 4 years out of them with half of that on 33" tires and the other half and currently on 35" tires. I have seen Moog, Mopar, AC Delco, and some no name ones with major price differences. Anyone have a preferance for a specific brand that would be "heavy duty" or is 4 years a respectable time frame.

Thanks

moogs should be lifetime warrenty right?