Autozone shows Gabriel and KYB shocks for the Traverse, and the KYB costs twice as much ($92 vs. $45). Any thoughts on what would make the KYB significantly better? The dust boot mounting rusted through on one of mine, and it's flopping around making lots of racket. After 150,000 miles and 6 years I figure the shocks are probably getting tired of potholes anyway and they aren't hard to replace.