I second Pete's advice. A mask has to fit, and you have to pay what you have to pay to get one that does. Price and mask quality are not terribly closely linked. Go to a bunch of dive shops and try masks on -- a properly fitted mask should be one that, if you put it on your face and push gently in with your fingers (and hold your breath), should stay on your face for at least four or five seconds before coming off. If it falls right off, it doesn't fit and it will leak. Don't let a shop person talk you into inhaling to do this -- if you put enough suction on a mask, it will stay, even if it doesn't fit very well!
Shops will also try to talk you into buying very fancy, expensive dry snorkels. In my experience, the more crud they've put on the end of a snorkel, the more the snorkel tends to fall over when not in your mouth, which torques your mask strap and leads to leakage. Buy a simple, cheap snorkel; you can replace it easily later if you are dissatisfied with it. A lot of folks who dive in kelp a lot take them off their masks, anyway.
Same with fins. The shop will try to steer you to the most expensive, highest profit margin fins they carry. Don't spend $200 for a set of fins for your OW class! Buy a simple set of paddle fins (it's worth paying extra if they come with some kind of spring or stretch strap). If you become an avid diver, it's highly likely you'll end up with a whole Imelda Marcos closet full of fins, but you can start cheap.
I have a message in to a friend who is a San Diego scuba instructor -- I don't think he teaches OW, but I've asked him for recommendations, and if he gets back to me, I'll send you a message.
---------- Post added June 28th, 2013 at 09:02 PM ----------
I checked with friends in San Diego, and they recommended
San Diego Divers. They would certainly be worth talking to, because I trust the folks I checked with.