I need a professional company that uses only opt-in email addresses and can geotarget campaigns.

This will depend on your target audience. Different companies serve different areas and will tell you if they handle your demographic. Have you considered "piggy-backing" your ads into established mailings (e-bulletins)? The cost tends to be lower and with better open rates.

Try ConstantContact.com, they are a great e-mail marketing provider. They have lots of templates to choose from and great customer service. I highly recommend them!!!