You can get a oceanic geo, aeris manta, cressi edy, sunnto misquito and mares nemo sport, they are on lower end of the price range for a wrist computer that also doubles as a watch. They are nitrox capable computers, but can also serve as a digital watch. They are about the same price as a good quality quartz dive watch, between 200-400 dollars.
I am not a big fan of using my dive computer as a watch, do not like idea of possibly damaging the dive computer. But I also like the fact of having a regular dive watch as a back up bottom timer to my computer.
I also perfer a large display of a standard computer over the ones that doubles as a watch due to the bigger screen.
Citizen makes good quartz diving watches in a wide range of price depending the features you want. But there are plenty of other watch companies that make excellent dive watches in the price range in the same price of a computer-watch combo. Luminox, sieko, fiesta and allot of others.