+1 on a 1/8 chain. Your chain is your control, so treat it well. People seem to like KMC chains, I run an Izumi Eco. You can go big and get an Izumi V Super Toughness, or other 50 dollar chains, but the consensus here is that they are a bit of an unneccessary overkill. Just a solid, 1/8 track chain will do you no wrong.