I use a SCS3 with my CS6s and Powerplane surrounds. For home theater, more info comes from the center than any other channel so you may want to consider having the "matching" center at least. I agree that matching surrounds is overkill for most systems as long as the surrounds are decent. I will upgrade to the larger Thiel center at some point as I feel it would blend with my bigger Thiels better.
Thiel SCS3
After auditioning a pair of Thiel CS 1.6's at home in my system, I've decided to sell my B&W Nautilus 804's and the HTM2 center. I love the B&Ws, but I have a relatively small listening area and I found that the Thiel's opened up at a much lower volume, making them a better match for my space. I haven't heard the SCS3, but I am a little shocked at its price. A pair of Thiel CS 1.6s will cost me what I consider a reasonable $2100, but a single coax design SCS3 is $1400. Thiel also promotes the SCS3 as a surround. Their pricing would make your surrounds more expensive than your fronts. It just doesn't make sense to me. My local dealer said alot of his Thiel sales go south because of this. Maybe the SCS3 is a wonderful center and worth the price, but I'm still a little confused. I'd love to hear from Thiel owners that use the SCS3 as a center, or better yet, possibly use a non Thiel that matches up well with the CS 1.6s. As another alternative, I'm also in the market for a used SCS3 if anyones selling one. Regards Herb