I don't think there is conclusive evidence that the VP150 has shortcomings.
My opinion is that positioning in the room is a very big deal relative to center channel speakers. I mean, that's why they're typically horizontal, right? It's not because that is necessarily "better", it's a compromise relative to real world listening environments. I think 3 identical front speakers is still probably ideal, but I also think it is a mistake to infer that - in all acoustic environments - the VP150 would be somehow suboptimal. Unless you have room to PROPERLY place a bookshelf or floorstander in the literal center position, a speaker specifically designed for alternate placement would be better, no?
I discovered a very meaningful difference moving my VP100 from under to on top of the TV. Don't underestimate the impact of room acoustics.
