I haven't touched my suspension yet but when I do, I will be going the KW route. I feel that you are paying too much for Dinan for what you get. Isn't the stage I Dinan just springs and a few other things at around $1,000? Where as springs (swfit, H&R, Eibach) are less than $500? Used KW kits go for around $1,500, just a little more than the Stage 1 Dinan but much more capable.
This is my .02 and my knowledge is from some brief readings. I haven't looked into this quite yet.