Interested in a lift kit for my truck. I've found tire and wheels which was the easy part but looking into a lift. Figuring 6" is what I'm going to go with but what brand do you guys like? I want something that will not have knocking or clunking noisy issues. Truck is used for towing also so it needs to be able to still tow without issues. 15' Silverado Crew Cab. Any help is appreciated.