Kydex material is the most popular material for competition holsters. The top names are Bladetech and Comp-tac. Cost should be in the $60 to $70 range. Check out their websites.
The Kydex holsters don't compare to a beautifully crafted leater holster, but they afford a quicker draw, and speed is the name of the game when it comes to competition. While they are fast they are very secure, and could be used for hunting, although I prefer my hunting holsters to have a strap to hold the gun secure. Get one that is legal for IDPA, and it will also be legal for USPSA/IDPA and ICORE.