The best center is exactly what you use for right and left front. In the early days, that was the recommendation for THX systems. The B&W THX Home Cinema system used three FCM8's across the front. Now all manufactures have a matched center. You must match your left and right speakers. The CC6 compliments the B&W 600's. Make sure you get the same series number or they will be different. I have replaced my B&W HTM with a third 802 to match my 802 left and right. The change is beyond dramatic. I highly recommend a full range center. As DTS music emerges, this is the way of the future. Look at the new products from Meridian and Theil.