I was wondering if there is any major difference between an 04, 05, or 06. I have a chance to buy an 04 that is already upgraded with mods but are the 05 or 06 that much better? I mean are they all about the same speed, handling the same? Should I buy the 04 or would it be better to look for an 05 or 06. Also is an 04 green sticker legal? Any help will be appreciated.