The Lsic, is a great center. VERY neutral sounding.
HT Labs Measures: Polk LSi Speaker System This graph shows the quasi-anechoic (employing close-miking of all woofers) frequency response of the LSi25 L/R (purple trace), PSW650 subwoofer (blue trace), LSiC center channel (green trace), LSiFX side surround channel (red trace), and LSi9 rear...
www.soundandvision.com
Honestly, probably better response overall than the Revel you are searching for.
This is a review and detailed measurements of the Revel M22 Stand-mount speaker. It is on kind loan from a member who I think was the second person to send me a speaker. The M22 is long discontinued. It cost I think US $2,000 when new but I see it on used market for around US $600. As such...
www.audiosciencereview.com
I found an LsiC, at a foreclosed house, long story, but got it for 50 bucks, expected to flip it for about $150.00, tried it out and would never part with it!
Not saying the Revel is bad at all, as it measures fairly good, except in the bass region mostly. Voices on the Lsic, sound Very real, and not thin.
I think the revel would be fine if the bass range was better (80-120 hz)