You will get MUCH better sound with 3 good speakers than with any soundbar, so there is nothing to worry about the sound quality. Optimal thing would be to get pair of stereo bookshelf speakers and matching center speaker. Of course it would work with matched 3 bookshelf speakers as well, but I would look for center channel instead if that is an option. You are better of starting your own topic for asking help to get more/better responses.
Those suggestions are 2 year old, so a lot has changed since then. But it will still give a good idea. For speakers I personally would look for these if you are in budget:
http://philharmonicaudio.com/aa.html