Hi there, Davey. Welcome to Nikonites. As to your question......how "wide angle" do you want to go? I could suggest a 24mm wide angle, or a 12mm, but....how deep is your wallet? How fast do you want the glass to be? F1.8? 2.8? 3.5? It's one of those ambiguous questions, bud.
All kidding aside, if you have the 18-55 kit lens that came with your camera, you're already started with a wide angle. Where you go from there would be entirely conjecture on my part. Perhaps others in here would offer you better suggestions.