Couple of things to make the initial choice easier.
Firstly narrow it down to Canon or Nikon. Then, if you've got any mates that use one or the other and have lots of kit, chose that brand.
I went with Canon because all my family, friends and my employer happen to use it, allowing me to borrow lens and accessories – which often make a bigger impact on the photos you take than the pros and cons of Canons and Nikons using a basic lens.