These are such awesome bookshelfs that really are just plainly awesome speakers. I would use these for all 6 channels.
They are Bi amps so you can hook the high and lows to different power sources. The benefit is really warm and rich tones.
Plus the ports really give you an amazing low.

This is center channel for the TFE line. Beautiful cabinet and sound. I have always loved the cherry wood. The dual drivers will give you an excellent voice range for all your home theater favorites.