Hey Bhurt, i changed because i didn't really like the ride with it leveled... i also wanted after market rims and wanted to keep a tire around a 35, my 325/65 r18's fit stock but they did hit the sway bar under full lock it was totally acceptable buuutttt not if i wanted to change rims out, i went with the BDS 4.5 as i wanted the best ride quality possible on a lifted truck... i also chose the 4.5 as i just wanted enough lift to clear 35's.... atleast to me 6+ inchs of lift look better on 37's.... (some pull it off great with 35's... but more not than do to me...) i'm also getting in my higher 30's so i am not really interested (nor do i really like the deep dish rims... ) so after researching for endless hours i settled on the BDS 4.5 with an 18x9 +1 offset rim, it's not in your face crazy and still practical so i can pull my 10,000 pound trailer / boat carrier etc it's 4.5 up front and 3 in the rear, i have not hooked up to the trailer yet but if it sags more than an inch i will look into alternatives to get slightly more lift on the back.... i am trying to avoid air bags for now...
honestly i'm a picky OCD kind of person, it still does not ride like stock... it's around how it was leveled really.... but i do like it 1000% more than when it was stock