Last year, I replaced all four ball joints on my 2003 (along with new uppers from JBA). The other day I noticed that the rubber boot on one of the lowers was cut open. The local Napa is quoting $60 for their valueline brand and $80 for their higher end one. Amazon has ACDelco, Diften, Proforged, Detroit axel for less. Would I be getting anything out of going with the Napa, or are the brands on Amazon quality?