I am going w/ an Icon 6" (35" tires since there $400 cheaper than the 37") heard alot of good things about the ride quality and the springs are lifetime warrantied. You can get them the cheapest @ "offroadwarehouse.com". Beware some people here will try to sell you lifts but are just another middle man to jack up the price. Bought a lift from Cary @ ctperformanceinc.com had to return it due to the fact that he threw in a few items @ the end and they were way overpriced compared to what I could get them for myself (a supposed dealer?). I received some items accidentally and they were shipped from another retail shop instead of the manufacturer. Had later talked to Icon myself they didnt agree w/ his advice and told me to order the 6" spring lift instead of 4.5" hanger and $400 worth the upgraded new factory springs. Cost me $100 to ship them back to Ford! Still arguing about whos going to pay for that...