A:Answer Answer is based on my general experience.
1.The center channel speaker needs to be large enough or "in balance" with your main L/R speakers. I once had a set of Bose 301 main speakers coupled with a Bose Center Channel speaker. The 301's were too large and the sound coming out from them was over powering the center channel speaker. I did not get the correct dialogue out of the center channel speaker until I went with a much smaller set of main speakers. Solution is either get a larger center channel speaker or get smaller main speakers
2. Audio Settings. Play with all of the different sound fields available on the receiver and find what you like. Depending on movie, you may have to select a different sound field.
3. Be realistic about your home entertainment system. Movie theaters spend A LOT OF MONEY on Audio. Work within parameters of the room you have your A/V in, the equipment you have, the budget you have, and how much more money you are willing to spend. Perfecting a system can take quite a bit of tinkering, money, and time.
One of the things I like about Best Buy is the return policy. When you buy something, install it right away, play with it, adjust it, and let your ear be the judge. If you don't like the sound, return it within the return window. Try something else and repeat the process until you like what you hear/see.