The most important, find a caterer that you like in food and style. Remember, these are the people that will make your day and they will be the service staff to take care of you for the night.
Second, don't necessarily select only on price. Most caterers have a similar price range when comparing "apples and apples". If you find a caterer that you like, but the quote is too high, ask them how you both can work together. It might require adjusting some of the food choices, but getting the team you trust to lead your day is one of the most important choices you can make.
The recommended vendor list has caterers that have consistently performed and includes a broad range of styles and pricing options. If you are looking for a price point and/or style, we will be glad to point you to a few likely options.