From reading posts here, I had the front springs replaced with Progressives before I brought my Speedmaster home. No sagging or bouncing at all. I now have Progressive 412's on the rear. Altough an improvement over the stock shocks....no WOW factor for me. I'd get the 440's or maybe even better, the Hagon Nitros. Maybe Staffo will jump in here as he has the Nitros and claims a PLUSH ride. That's what I want.