As mentioned, for a simple watch it is hard to beat a Seiko divers. My oldest was bought new in 93 and it's still in great shape despite tons of water time. It does gain time, but it is predictible. I've also logged lots of time with a Citizen HyperAqualand which is a good "digital" option if you want a depth gauge and dive log functions. The batteries last for several years. I've had good luck with the original style Citizen Aqualand Pro as well, which is one of my favorite looking watches. As for G-Shocks, if you are using the buttons a lot while submerged, they tend to get a bit "misty." This may be better with the newer "Mudman" style buttons. Same for Luminox. The original version took on moisture on me in 10fsw, although I was working around some high-velocity pumps that were pushing a lot of water. So, under $250, take your pick of Seikos, $300 and around, Citizen gives you some "backup" functionality. Either will last you for years....