Im looking at getting a lift for my X sometime this summer and I am stuck between the Calmini and the SLR.. I already have the Calmini Shackles and I would like to keep cost down but I am willing to pay for quality because I offroad quite a bit and want something that isn't going to break on me.. What are some of the strenghts and weak spots of each lift kit?? And if I go with the SLR will I need to get rid of my shackles??