These things are a tough choice. I have owned all of the different valves yoru talking about. The only one worth dealing with, for me, has been the v force 3. My jetting remained in the normal range with this product.
The rad valve made my bike hit slightly harder. BUT>>>>>>The jetting was so off the charts I have to replace every jet as well as the needle to make my bike run.
Thee v force dropped right in. My powerband may be wider than stock. Certainly not worth the 125.00 dollars it cost.
My advise would be to use the carbon tech reeds bolted to the stock reed cage. Jet your bike properly.
Take the left over money and send it to eric for a port job. You'll be money and performance ahead with this.
To give you some idea of my jetting adventures with the rad valve, I now own every Kehin main jet from size 155-180. I have 5 needles and 5 pilot jets...
I think many of the bolt on parts make your bike feel faster by removing power. For example, if you remove just low end, the midrange feels like it hits harder.