3 identical speakers across the front is the ideal situation. Horizontal centers are a compromise to fit 'nicely' into most HTs as they fit into equipment racks/shelving where they blend in better.

I would be tempted to go with the W22s and w100/150 because the W22 is a better speaker. I think you gain more with the W22 than you lose going to the W100/150.

Of course 3 W22s would be best...

Fred

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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!