Configuration is not much of an issue for 5 miles. I put fixie because they are least demanding from the maintenance stand point - just oil the chain and replace the brake pads from time to time. Also, they don't make surprise gear shifts, or throw or suck the chain in traffic.
(Just remember to tuck your pants and laces!) Control is good a low speeds, and the bike won't try to run away on hills. Finally, riding one takes a bit of learning, so your typical hop-on-and-run type bicycle thief will more likely make a quick face plant than a quick getaway.
