Choosing between ridetech coil Over System and Speed tech sub and rear

[kurider]

Anyone have any thoughts on the Ridetech coil over system vs the speedtech complete sub with the torque arm rear suspension. My car will be a street machine and will rarely see the track. I want the car to have a low stance. Just looking for some thoughts and if there are any other opinions on other combos I would love to hear them. I thought about air ride but the ride height was raised too much to my liking. Thanks in advance.