Top two must have Nikon d3100 lenses?

I currently own the kit lens a nikkor 35mm prime, and that one is amazing. I really don't see a point in getting rid of that one as I would like to keep it for portraits. In a 300 dollar budget, what lens should I buy to replace the kit lens (18-55mm) as I can just use my feet for such a small zoom anyway?

Added (1). Because the speed and quality on the 35mm is amazing, why would I need a zoom lens that has barely any additional range than it?

Why replace a good lens like the 18-55mm? I just added to mine, the 55-200mm VR.