Club members can help. Get their feelings on reliability, speed, and the accessibility of their technical support. I guarrantee that the cheapest service in the world is too expensive if you can't get help. Pricing is not a big deal. Most services are competitive.
Many computer magazines compare prices.
Most services offer 2 or more service levels, with a base price offering mail, and 10 hours a month, anything over for an hourly rate. For occasional users, this is your best buy. Worth the cost. For business purposes, shop around for business packages. You will have to do some research.