31K OTD is an awesome price. Go for the sport esp since you don't wanna dump money. At least you wont ever be thinking DAMN I shoulda got the sport pkg... I don't know any guys who got the sport pkg who are wishing they got the base model
Oh and just so you know, you're getting the red car for less than what I paid for my base +sport and added clearbra right after for +800 which I bought in March... Get it now!