if you're not going to need camber adjustments very often, I'd go with ingalls.

if you want an adjustable a-arm style, I'd go with SPC over skunk2. Many folks have found the hardware on the s2 kits just doesn't hold up and slips or breaks over time. People who are hard on them often have to modify the s2 hardware with better stuff to make it work. People have also had problems with the inside edge rubbing on the inner fender/strut mount area. I've never heard of any problems with SPC.