What are you guys paying on your C63's a month??? I'm thinking about upgrading my G35 that I'm paying about 530 a month for. I was thinking about putting down about 4 g's plus the value of my trade in (it's worth more than I owe). I checked out a porsche caymen, and that will run me about 830 a month, which is not too bad. My whole deal is trying to get a 4 door. Thx for any help.