I've recently bought a Nikon D80 with an 18 - 135 f/3.5 lens and am now looking to purchase another lens. Being a complete novice I'm unsure of what to get next. I'm on a budget and don't want to spend more than about £200 Would the 18 - 55 f/3.5 give me anything that my current lens doesn't? If not, any suggestions for an all rounder lens?