Has he considered an acoustically transparent screen? Then he can put all three speakers behind it, and it will allow the center to be in the middle and all three fronts can be the same speaker.
If this is not an option, I think the single center above/below only really becomes an issue if you have more than one row of seating, in which case he may want a pair. With one row you can just aim the center right at it. Axiom will recommend the 150 over the 100 when you get more than about 12' from it.
Last edited by Potatohead; 06/10/09 06:10 PM.
