Could someone suggest a center channel to go with my Polk Audio LSi7's? The fronts and rears are all LSi7. Subwoofer is SVS PB1-ISD, which hopefully will be here in a few days. Receiver is Yamaha HTR-5760. I was thinking of getting the Polk Audio CSi5 as the center channel since it kinda fit my budget. This setup will be mostly for watching movies. Thanks.