hi i have been looking at the 4" Rough Country Spindle lift and 2" Tuff Country Add-a Leaf set-up. id like to know your guys opinons on the set up and if any one has/ had it. Note: since my truck is 2wd i wont be doing any off-roading, strictly on the street/for looks only. Also id like to run 31" Pro Comp A/t tires so hopefully it wont hurt my mpg or speedometer too much? liked to know if theres any major wear and tear that comes with the set-up, or anything i forgot to mention thanx.