Compare the answers, it will tell you which ISP you might want to try. Realize that trying an ISP is not a long-term thing. It's best that once you get established, you stick with an ISP because it's just like your business address. People are going to be emailing you, and if you're moving around a lot they will have a hard time doing that. Ask your friends.
Most people know people who are online.
Most of my business is referrals from people who use our service. If you get favorable reports, try that service. Businesses who are interested in having a presence on the internet with a domain name, that can be moved to any internet provider. So, if you don't necessarily choose the provider that you thought you wanted, you're not going to loose all that work and domain name recognition. In 5 years a lot can change in dial-up access.