I agree with everyone else, but will make one other point: If the speakers are behind the screen, I would opt to get the tweeters mid-screen, as that's where you'll likely "identify the sound.... and it should seem as if it's coming right off the screen.

Depending upon how far back you're sitting from the screen, that likely won't put the tweeters (too) high, though that might happen if you're sitting really close.

::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::