There may not be a best place to live if you have allergies. People with allergies have an genetic tendency to produce IgE, the allergic antibody, to many seasonable allergens. If you move, you move your IgE with you. It might not happen right away, but chances are if you move you will develop an entire new set of allergic responses in the new location. If you are planning a move, you may want to talk with your allergist first.