I've got the ORDs too in 4". The ride is better and the flex is amazing, especially in front (I got all 4). I will caution that it's not exactly a bolt in situation, at least it wasn't for me. You go down a rabbit hole a little where you have to figure out how to deal with all the travel so shocks, brake lines, driveshafts, etc don't max out when flexing.
Regarding lift, mine came in more like 5" than 4" and I'm technically not even clearing my 35's. I can get some minor rub in front when flexed and the tire shoves up in there. I don't think 37's will go with 6" if you don't trim at all and are "using" the springs. I do have some hope that with minimal trimming I could get 37's to work though, and I'm not interested in severely hacking my body work.
One thing to think about is that if you get the ORDs, they can make them offset so the front axle is moved forward 1" or maybe 2 (?), and that can make a big difference with the rubbing. I didn't go that way but kind of wish I had.