saddlesore,

I have 2 centers.

I have a VP150 that I tried over and under the screen but could never get the proper localization.

I bought 2 Axioms M3s for the task and love them. They run in parallel from an M200. The lower speaker is placed a little farther away to match the distance of the speaker above the screen. I also think that the M3s give you more lower frequency response than the VP150 and I like that too.

The VP150 is used as channel 6 right now, but doesn't get much use. I will probably ebay it.