schoolsux
Go to guitarcenter.com, thats the place where i bought mine. Its really cheap. I recomend using yamaha or fender acoustics.

TR
Buying a guitar is a personal thing. The reason there are so many brands and models is that there are so many different guitarists with different tastes and styles. So you need to know how to find the right guitar for you. Go to a really good music store that has lots of different brands and try out all of the ones in your price range--and also some that are a little above your price range. Take along a knowledgeable friend if you have one. Even if you don't know how to play well, you can get a sense of how the guitar feels--and feel is important, you will enjoy playing much more if your left hand loves being wrapped around the neck, if your right arm drapes comfortable over the body, if your left fingers can reach all strings easily and your right hand naturally comes down on the strings near the center of the body, where you want to hit them. Now get the friend or a sales clerk to play each feel-good guitar (same tunes on each) while you turn your back--the ones that sound best then are the ones you want. Now, acoustics are not absolutely consistent--two guitars of exactly the same model will sound different due to variability in wood grain, manufacturing tolerances, and other factors. So the one that sounds good is the very one you want--the display model--don't accept "new in box from the storeroom" because it may not sound as good.