I need to get my provisions from the Farmers' Market in Union Square (Manhattan) to my house in Western Queens, a distance of ~ten miles. I'm just too lazy to schlep it in my messenger bag and trailers in New York City are not an option. Any opinions on either the Arkel Utility Basket or the Carradice Shopping Pannier? I'd prefer something that is "grocery specific" ie has a flat bottom for easier packing and is shaped something like a paper bag but still nimble enough for Manhattan traffic.