General Rule of thumb is for your car payment to be 20% of your monthly income, if it exceeds that i wouldnt advise it depending on your expenses
aka: rent/utilities/phone/internet/cable/food/insurance/credit cards/possible G/F etc
so i guess it depends on how much you put as a down payment; also if you are looking to afford a vehicle you may benefit from a used 370z, i have seen a couple advertised on these boards that i wished i would have seen before i bought mine new
if you are able to get one, you will not mind living off of ramen noodles for the remainder of your loans term lol