I was told years ago at some highend audio/visual store that when matching different name brands for different channels, use the sensitivity dB number as a guide. I've never heard that advice again so I don't know how good that advice is. But that's what I've done. I have Audiofile 830L's for my main speakers 91dB ,400 watt 3 way's floor standing. With an Onkyo receiver, they sound great! Had them(speakers) for about 10 yrs. Never thought I would need more. They're out of business now. So recently I actually found a center channel that is close in sensitivity as well as design. They look like the same brand. That is important to me, I'm not a purist but I want them to look good as well. They're MTX monitor6c. Redoing my whole setup so haven't heard them yet. But if anyone has any advice or opinion on this I would like to hear it. May use some Boston Acostics for back channels or some small wall mountable speakers. I did notice MTX matches the sensitivity with their main & center channel setup, but not with their back channel's. Just sayin'. I've always liked Polk Audio, they always sound better in a side by side comparison to others in their price range.