If I was building a pool room with your budget, I would for sure put in a hardwood floor. Why? It looks great and if your opponent makes a good shot and you go tap tap.....you can actually HEAR THE TAP TAP.
Let me try this one... heres hoping it works.
http://www.puzzlefloor.com/images/gallery/Inset_floor.jpg
I have cork in my pool room and it is very nice. It is not as soft as you would think and it does not do much to muffle the sound but I still like it.:thumbup: