When I started my directory it was very important for me to find a good hosting site. You want to find one that is both reliable and won't break the bank. Hostgator is definitely a good one. Other than their top notch service, another great thing about them is that they constantly offer coupons.
Host Gator Hosting Coupons is a great resource to find the latest coupons. Not only do they offer coupons, they also are a great all around resource for researching your hosting options. They have a list of recommended hosts to make the decision easier for you.
Research is the most important thing you can do when you choose hosting. No matter how cheap someone may be, if their servers are constantly down, they will not be doing you any good. Customer support is another very important option. You want to find someone who will be there to help you. Taking your money should not be their only service.