I own a Dyna for my 250R and I love it. I had spoken with Dyna over 1 month ago, and they told me they would have one ready with in 2 weeks, but i guess it is still not ready. I have seen the vortex and had my eye on that one for a while. I like the fact that it has 10 different pre-set powercurves already. The vortex is 400 and the Dyna is 430. I'm not sure if I need a full blown out CDI like these, I'm only looking for a few more RPM'S, hence I was looking at the rev boxes. But it will all depend on the cost of these rev boxes. If they are more than $250 then I may go with something like the vortex cdi, and get many more added bonues.