For a concrete pool you also need coping which i dont think is included in that price. The best thing you could do would be getting a few quotes done. It costs nothing and you are under no obligation to buy. Get a few different places out and compair the quotes and see if you can strike some deals. Maybe wait till summer is over too as the cost usually goes down in the cooler weather when its the last thing people are thinking about doing. Some pool places offer good finance options too. Happy pool shopping - we are currently thinking about a pool too (but not for another 18 months).
Maybe look into getting a fibreglass pool - much cheaper than concrete.