Jim Salk has an Accuton based center that has a flat frequency response. He can finish it to match your speakers.
http://www.salksound.com/soundscape%20center%20-%20home.htm
http://www.salksound.com/soundscape%20center%20-%20home.htm
Center channel for Avalon Eidolons
I'm considering moving up to a pair of Avalon Eidolons (the original, not vision or diamond) for my main speakers. Is there a matched center channel speaker for these? I know they have centers for some of their current lines, but I was wondering what would be best suited for these older speakers. Thanks. -Dave