Actually, come to think of it... the Dragon 600SP 121" is a better place to start if you want to go with a 2009 and throw on a VE RBC boondocker tunnel. Throw on your EZ-Ryde, and track, get the shocks revalved by Zbros and go with some triple rate springs.
Advantages over building up a 2009 RMK Dragon
Lower "entry fee" than starting with RMK dragon
It's already plumbed for the Running Board edge Coolers (RBC) but still has the RAW Ergos.
600 CFI-4 prime candiate for the BD turbo, plenty of power, 170 - 230 hp on boost, and better throttle response than a 700 or 800 on boost [But you will have to get the ECU reflashed for the mountains]
Cool windshield
Excellent coilover WE Remote res Clicker coilovers
43" front end (same as assault)
Easy to sell the Ripsaw track, tunnel and premium rear skid on ebay for $$$
Lightweight rotor and mag chaincase cover already installed
Pull off the SP decals and install the Assaults
Easy to remove the link-type swaybar OR add quick disconnects and leave it (best of both worlds)