Do an Axiom search for phantom going back at least two weeks. You'll find opinions on using no center.

You won't miss a thing as long as you are in/near the sweet spot. The only advantage I can see to a dedicated center is that it anchors dialog to the screen for those sitting off axis. The disadvantage is that, IMO, center speakers never sound exactly the same, particularly in timbre and soundstage scale, as the LR mains.

I live the life I love and I love the life I live.