The LP-15s are awesome. I had them on the last truck. I then switched to the "Sport Series." I haven't got a single negative word to say about Hellwig. Unloaded, the truck rides like stock.
I have had the RAS installed for almost 2 yrs now and like it. I put it on because the A.R.E. cap raised the center of gravity and the EE sway bar on the rear needed help. Do install the MOOG front end links as well.