Acidtrip - fit is the most important thing - you want something which is snug yet comfortable for you. As iriver said, all helments need to pass safety tests to be sold in a certain market, so in terms of protection they are similar. Bell and Giro are the two largest brands, though a number of other companies also make excellent helmets. Go to some stores and try some on.
Dan, I agree with Old Pa. In your price bracket the 'no/lo name' brand give excellent value. At that level all the frames are going to be of a very similar quality. However how well they are put together will vary greatly. Proper assembly of a bike will be the biggest contributing factor to reliability given similar quality components. I couldn't recommend Campag components at that price point - in fact you'd probably be hard pressed to find anything which will give you that. They work great and are my preference at the higher end, but once you need to replace parts which wear (chains, cables, cassettes) they will be harder to find and more expensive. Stick with Shimano.
Robb - stick with the understated grey - very nice bike. Nothing worse than a beatiful bike ruined by gaudy tyres!