Get a Seiko with the 7S26 automatic movement. Any Seiko "5" model will do. All of them are at least 5ATM waterproof, built to very high standards for the money and will run close to forever. eBay is loaded with them. many will fall into your price-range.
The 7S26 is very accurate, although regulation varies from sample to sample. Expect something between + 10 and +20 secs/24. Near-impossible to regulate by a non-professional (I used to fall into that category myself

), spend a few bucks to have this done by a good local watchmaker. I got mine within 1 or 2 secs a day now. :thumbup:
Remember, you want a watch that doesn't break down on you because of an empty battery! When I'm off to Sweden end of this month, it's gonna be the Seiko for me. Seiko's automatic winding system is more efficient than any Swiss system out there. Remember you heard that from me!