Thanks guys.
No room for a vertical center. I did try a few different things this morning though.
First, I pulled the center forward about a foot so that it was even with the side towers.
Next I put a book underneath it to elevate the front a bit as it does sit below the screen.
And lastly I took the volume up to -20.
I popped in Black Hawk Down, Master and Commander, and the asteroid chase scene from The Clone Wars.
There definately was a difference in the sound field. Could it be because the VP150 is a 6ohm speaker as opposed to the 'regular' 8ohm rated speakers and needs to be fed more juice?
I know when I was running the Klipsch setup my volume knob didnt need to go louder than -32. But when I had my Energys, and now my Axioms, I really need to crank it up to between -25/-20.