If you can muster $250 or so, then Dean Performer E is one of the best valued in that money area. If you can get more, then ANY Taylor will be the best. Taylors cost a lot though.
However, it depends on what kind of guitar you are looking for (what is your playing style)?
Edit: The Taylor 414ce is what I play now, and is the best acoustic-electric or acoustic I have ever tried (including all sorts of martins, higher end taylors, and breedloves)