You need to remember that the strings on guitars in the stores are generally very old and dead. If you like the feel of the guitar but not so much the sound.....I'd ask for a new set of strings to be put on it.
I would even volunteer to change them for the store..... as long as the store provides them. Convince them that the sound quality is the only thing holding you back from pulling out the cash/plastic.
Play it with new strings. I have a nice Taylor which sounds amazing with new strings. But let them set for a while and it sounds like a cheaper guitar fairly quickly.