Needing ball joints, was looking on rock auto, and they list a set from Raybestos, 5001117 upper and 5051311 lower, which seems to match up with the spicer numbers. Are the raybestos made by spicer, and are they any good?
I've read that lots of people have problems with those. I don't know if the techs installing them just aren't sharp enough to get it right the first time or what.
You are going to have good and bad about every company. I went with Moog about 150k and I haven't had one problem out of them. The two things I recommend is 1) get ball joints that can be greased regularly, seeing is that is probably the biggest downfall to the stock units; 2) Make sure you grease them regularly. I grease mine every time I rotate my tires (600-7500 miles)