There is another company coming out with one which have been in the CDI market for a while. I would hold off on this one (CDI from the company above) and maybe upgrade on the rectifier thye have.
Check out these two sites: The first one is the is by far a better one, they are coming out very soon which I am hopefuly going to test out their R&D unit
I like the Dyna stuff the best, I talked with them in technical terms and they know their stuff and they in the USA too I know I am in Canada but they have been huge in the racing market!
and the Vortex X10:
This company is from austrailia and they have one distributor (Duncan racing) in the USA. They do make a good product! But I still side on the DynaTek one
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.