Exactly why you should take your time and research all the variables for your ride. You should be able to get a good bike for what you want it for for that or maybe even less if you look around.

It's important to understand the components and what the bike is set up for just in case you decide to start upgrading. I agree, maybe a hybrid bike would be suited for your commute. A 28 mile round trip commute is a pretty good one.

Another thing you may want to do would be to borrow someones bike (if you have that option...) make sure that it's set up correctly so you can enjoy the ride and go for it. Ride for a couple of days or perhaps even a week or so, just to see what you think. At least you'll have a better feel for what you are going to want in a bike should you decide to buy your own. I would be willing to bet you could probably rent a pretty good bike there in Huntington Beach somewhere.

Just one more thing, try to remember it does take a little getting used to when you start riding more routinely. Stick with it. Before you know it, you'll begin to feel better, look better and hopefully grow to enjoy cycling for more than just your commute. Not to mention the $$$ you'll save by riding that distance instead of pouring it into your gas tank.

Good Luck!