On 10/11 I am headed down to Ocean City, MD for a crusin car show weekend. The show is at the inlet parking lot as well as in the parking lot of the convention center and inside the convention center. They also do a parade of the cars down the boardwalk on Saturday. I currently have a Nikon D5100 with a 18-55mm f/3.5-5.6 and 18-200mm f/3.5-5.6 lens'. I was at the camera store today and the girl at the shop suggested I use one of these: Nikon 10-24mm F/3.5-4.5 G ED or the Sigma 10-20mm F/4-5.6 EX DC or the Sigma 10-22mm F/3.5 EX DC HSM. I want to be able to use this lens to take photos outside in all locations as well as inside the center and hopefully some shots of cars running up and down the strip. All are available to rent and since I can only rent one, which would be the better choice? I was leaning toward the Nikon.... Thanks for any suggestions on these or something else. BTW I am strictly an amateur and this is just one of the subjects I like to shoot. ~ Joe.