If you get AWD and the 18" option, your top speed is lowered.
Prior to getting mine, I wanted the RWD and the missing options the US market don't get. With all the rain we have been getting lately and snow our area have been receiving the past few years, I pondered about a winter tire option in the future. After researching a car for my buddy wife, I lucked out and found the only available Ceramic Silver w/Red interior, which had AWD, in our area (others had lots of miles on them or were being used by dealer personnel) with low miles and I pounced on it. Why? Mainly it's me and the wife, at times, in the car. AWD means it will be able to get around with some good UHP AS tires in the winter without the need to swap winters on, plus the price on it was pretty good.
If the GT had the HK system, I might have gone for that when they first came out as with the standard suspension setup, it drove and handled quite well.