I think the rocket is a 2.3L mate. Anyway its great engine and a great bike, it corners very well for a bike its size but it is probably worth testing one with the pegs not the footboards as it makes a huge difference to the ride.
Anyway the amount of raw power if you get the traction control removed, open up the exhausts and drop the cat converter is amazing.
In terms of maintenance there is next to none, just do the usual servicing and keep it under warranty, a rear tire will be your biggest expense as you will chew them something stupid.
As for aftermarket bits, tons of chrome goodies to bolt on and make it look pretty, your local dealership will have a range you can look through.
You have a secondhand market for these too, so dont jump into a new one right away if you don't need to.
Good luck!