I know that this there are so many posts about sprint springs, but I was searching and couldnt really find my answer. I wanted to know what the quality of these springs are, like the build quality, will they sag easily? Ride quality? How realiable are they compared to Eibach's? I currently have Eibach's, I know there good stuff - company reputation - but I'd like to have a lower front end then what the Eibach's can offer. Please help me out, dont want to spend money and later on down the line the springs go bad.