I just made a switch from my old tfactors to the vapors, and I lightened my ski up so much. Not to mention the d3 t factors come up so much higher than the radar vapors which really messed up my edging with the higher boots. Also, the vapors are a lot more responsive than the d3s, because the radars are a hybrid, so basically a soft shell mixed with a hard shell. With the d3s I had to physically do the edging and cutting my self, but if I barley turn my ankle, the ski will turn. It's all personal performance though. If your doing good on the boots your on now, stay on them, unless it's after nationals which is the time of year to make any equipment changes.