My personal recommendation is to go with a KP 6 link kit from suicide doors.
suicidedoors.com/4LinkKit...onents.phpIt's a bit pricey, but it's also about the best link system you can buy for these trucks. If you're a do-it-yourselfer, you can build this same kit with your own metal for about a quarter of the price, but you really gotta know your measurements.
As for a bag kit, I would HIGHLY recommend piecing together your own air management kit. Read up on what's what, because there's always going to be something you want that isn't in the kit. When you build your own kit, you get exactly what YOU want, for YOUR needs.
Read up on
www.bagginit.com (if the site ever works again) and it gives alot of great info on air suspension. Because trust me, when you build it yourself, you get what you want, and you get the satisfaction of knowing you picked out everything yourself.