We recommend the PV3 infloor cleaning system by Paramount Industries. (You will find their link on my equipment page) This is a custom built infloor cleaning system. Built into the floor, steps,, benches, etc. of your pool. It runs off of the pools existing hydraulic system, but must be installed during construction.
Another good option is the Polaris 9300 series. These are electronic, computer driven robots that clean your pool. You can see them at polarispool.com
And finally there are cheaper pressure pool vacs that work okay, but you get what you pay for here.