I would suggest to wall mount your TV. If the speakers are small and light better to wall mount them also. the center speaker can be mounted below or top of your Tv.
check this link for speaker guide and placement locations:
http://forum.blu-ray.com/speakers/66471-guide-bipolar-dipolar-direct-radiating-monopole-surround-speakers.html
congrats to your upcoming setup...
but I suggest to change the title ..
otherwise it should be at general audio discussion forum...