Come on out...
Stage-1 on pump gas? Even with C16, you need to drop compression...
Gen-II has lighter valve springs, titanium valves, and higher compression so you need to swap them out when you drop compression. The rods are the weak link over 300whp+ and some say pistons should be changed 350+ bust most do them while it's apart...
They are great all around bikes. You really can't go wrong with any of them, no real issues. 03+ had most of the updates though they were minor if you are looking for one...
Don't forget 8-injectors also so you don't need a piggyback setup. Plus, you can do about anything with the ECU now so less additional electronics to buy. Better brakes, radiator w/two fans, tranny upgrades, etc...