First, you'll need to figure out what type of surfacing you want. For more information on different types of surfacing click here. In short there are paint and tiles. This page will focus on tiles because it seems to be the popular choice now-a-days although paint (even if you want to cushion your knees is still a very viable option).
In the modular suspended tile business manufactures are usually very closely assoiated with the dealers. In large markets dealers will have showrooms and sample courts that you can tour. Some sport surfacing companies include RhinoCourt, SportCourts, VersaCourt and FlexCourt. All of these companies have very comparable products.
The basic spiel goes as such. It cushions your legs like a real hard wood floor. Water drains quickly from the court making it safe. All of the court markings are done for you. Your court is warranted for ~10 years. It looks good. If those things sound good to you and are worth anywhere between $9,000.00 and $60,000.00 a modular tile court building company might be right up your alley.