I have the Eibach Pro truck lift and cannot be happier with this purchase. In terms of looks of your vehicle, the upgrade in suspension, or the overall increase in performance on/off road, i have no complaints whatsoever. I was originally looking at the 5100s as well but decided the extra money...
I’ve had my Eibach pro truck lift installed for little over a month now and have been very happy with it. Self installed and was actually pretty easy overall with the help of a buddy. I’ve taken it on some easy-moderate trails and it’s handled very well. As said by others, it rides a lot firmer...