I'd opt for the 8 speed. Especially if it has standard brakes. I am not a fan of drum brakes. Getting around Helena on a single speed would not be my choice. Very hilly. In your case you might be able to get away with a singlespeed but why? Wouldn't you rather have a bike equipped to handle various scenarios? Honestly, Single speeds are for trendys here who are more concerned about being seen than actually riding. I'm actually amazed they are still relevant. I thought they'd be a passing fancy to all but track riders. Who knew? My opinion only. :^) The riders I know have gears to match the terrain so they can get around more than just downtown. Just saying. Are you using it only on flatlands only or would this be an everything bike?