I am wanting to upgrade my WR426 to an auto-decomp ex cam. I know I can either get an 03 WR ex cam or one from Hotcams. Which one should I get? What's the big differences? If I were to get the Hotcams one do I need to get their intake cam as well to match up with it? I have all the usual mods done (grey wire, throttle screw, pipe, air lid gone, Jd jetted). Thanks for any help.