carlton has broken a few procomps. i have the fabtech and they work great. i also have a rancho which i'm going to install below the fabtech to try to get another inch of lift. also getting the 1" SLR shackles. i'll post pictures once its installed.
I dont think procomp has AAL's made specifically for the Xterra. They probably do have long and short AAL's made for mini trucks that might work though. i also know that trail master has long and short AAL's for mini trucks that might work as well.