Any of them are a little much to start on. Go to the MSF course first, and take that. Afterwards start looking at bikes. Get a cheap used bike to ride for the first few months. You want a beginner bike - steel frame, low cost, easy to ride, won't get hurt if you drop it. Get used to riding. Then sell it for what you bought it for, and get a 600. That way, you won't cry when you drop your bike. Spend you money on good gear.