yup - I had the sogcenter for a period of time. Very good, no doubt. But I'm always looking for the "next big thing" so curious as to how the ss8 would compare to the songcenter
There is really no comparison. This is basically an SS8 in a horizontal cabinet. The RAAL ribbon tweeter means the top end would be more extended and more transparent. The Accuton midrange will keep dialogue extremely clear and detailed. The the woofer section plays down to 25Hz. The result is an extremely competent full-range center channel.
As for your question about timbre matching, all of our speakers are voiced very similarly. I used this center in my home theater with a pair of SongTower ST's for a while and the combination never called attention to itself. I don't see any issues with that combination.
I hope this helps.