I agree with grahamcurtis about Elixir strings. As with most guitars, electric or acoustic, the strings mean quite a bit to the overall sound of the instrument. Elixir strings give me the best sound, along with long-life. And remember, on an acoustic especially, that bigger strings will render bigger sound. Get the biggest guage strings you can stand (IMHO) and the sound will be fuller and more robust than with Xtra Light strings. More times than any, LIGHT gauge strings for an avoustic will serve you well. I use Elixir Nanoweb LIGHT .012-.053 on my 6-string and it is the perfect match (for me).
I know I kinda went off the subject, but strings do make a difference. As far as guitars...well, you got even more differences there, my firend. Just play them. Even though most high-quality acoustic guitars are made by well-known companies, that doesn't mean that all of the ones they make will outdo others at a lower cost. Find your favorites (Brand) and play them. Then play others. Heck, play them all!!! You will find your baby, and you will cherish it from now on. That what matters.
Gibson Les Paul Studio (customized) * Epiphone Zakk Wylde Custom Les Paul "Camo" * Breedlove 6-string acoustic * Takamine 12-string acoustic/electric * Line 6 Spider III 212 150 * Line 6 FBV Shortboard * New tight skin-toned colored Spandex and matching thong *