Besides the fact the 06' ..is newer, and the 03' is cheaper ..is there a milage difference ?
It's the same bike. What color do you like better?
This seems moreso a question of your budget. If you can afford the newer, get it.
If you are on a budget & money is tight- get the 03.
Lastly, get the '03. You now have $2000 in your pocket to do mods with. Imagine that.
In 04 we got the "Flash to Pass" switch.
Four way emergency flashers. And the, Parking lights (Turn key all the way backwards) Other than that, they are same.
Get the fatest color