Mods for a 600RR???????
NONE!!!!!!!!!!!!! LEAVE IT ALONE!!!!!!!!!!!!!!!!!!
That's what I would do.................but that's just me.
It depends on if you want your mods to be for looks only, performance only, or mods that do both at the same time.
Rims for looks are childish. Now rims that are lighter but look cool at the same time..........that's worth it. Frame sliders can look good and they'll save your engine in a wreck (don't expect them to save your plastics as well, that's NOT what they're for).
I wouldn't bother with a fender eliminator kit, just do a nice looking chop job or remove everything altogether. You don't need blinkers in the state of Virginia so they don't matter.
Carbon fiber is played out in my opinion. Bikes are getting to the point that cars are: when you do mods you look like everyone else, keeping it stock looks original.