I am really liking the throttle response and shifting on my 2004 Coupe; I thought I would trade for a Gransport in a year or so but now I think I will upgrade this 04 with wheels,ECU flash and some Grille changes; so what is the difference in the 06 coupe M/T? Some told me the software was different and that ALL the 2006 Manuals are basic no option cars; SO...would you trade an 04 with 13K miles that has all the options but NAV for a 06 low mileage NO option car with manual 6 speed? I am thinking way ahead as I JUST got this coupe! Car nut and got it bad!!!!!!!