I have them
Ava
A better question is are you happy with your suspension now? If not and you have the money then try the MX Tech treatment. I can tell you having the rebound adjustment has helped me go faster this season over last season because I can tune the bike to handle better. As far as a comparison between the Gold Valves and the MX Tech stuff I can't tell you because I didn't do them with gold valves first. I can tell you that MX Tech has top knotch products and service, highly regarded and works well...at least for me. The midvalves make for a smooth transition through the stroke and I don't feel any harshness even though I set my suspensiuon on the firm side so I can go fast. (in my mind anyway!) I suspect that if rode a sotck suspended KDX with just stiffer fork springs that I'd be scared to death to try some of the tihings I do now. I hope this helps, but I suspect it's a concern over spending money and thats a personal decision you must make because you'll never get a return on it when you sell your bike. But for me I live to today....I'll worry about resale later.
FT