The newest model is the 07. Honda doesnt' usually release 08 models until mid August or so.

Also, here's my take on the HRC kit. If that is the only upgrade you're ever planning on doing then get it. If you plan on throwing on an aftermarket pipe and at least a stage 2 performance kit, then you just wasted your money. The only thing you'd be using from the HRC kit is the CRF cam it comes with. When you buy the new high flow air filter and jets that come with the kit you just lost your jetting with the purchase and when you buy a new Exhaust you just lost your HRC head pipe. If you want the most bang for your buck, do the normal aftermarket upgrades, which you more than likely will do anyways, and buy an aftermarket CDI box for higher and quicker revving, put on at least a Mod Quad stage 2 performance kit and go buy a White Brothers exhaust. If you can find good deals on these parts you should be able to do it all under $650 bucks and the power increase will be substantially more than the HRC kit by itself.