The 5100's are known to blow out when combined with a 6" bracket lift, the 5125's will be too short for the bigger rear spacer. The only thing you will reuse from your current setup will be the bump stops and the UCA's. pretty much everything else will be replaced with the parts from the bracket lift which will include the rear shocks, but not the fronts. Rough Country is the least expensive, about $1000 right now on sale. Next would be the Procomp which is about $1600.