Can only really comment on a couple of things, plus i have a 200 so cannot comment on the 300 although they will be very similar. As you want an auto you'll prob want a 300, im sure most people will say that auto box is better. Mine is comfortable and the half leather/half suede seats are good enough for me. Leg/head room depends on how tall you are really, im about 6ft 5 and head room isnt brilliant but leg room is fine cos of the adjustable seats. Very reliable cars, 300,000 + kms no problem (im thinkin of the 200 but im sure the 300 is also super reliable). Either way im sure everyone would agree that you shud just test drive both and make your mind up yourself. Lastly, although the 300 is faster if engine swaps or any sort of turboing would interest you then Ray Hall Turbocharging ( www.turbofast.com.au ) would be a good place to go whether you got a 200 or 300.