I've been collecting some Optimus speakers with Linaeum tweeters and I'm trying to figure out the best way to configure them for a 5.1 surround system. I have (2) Pro LX-4, (4) Pro X77, and (5) Pro LX-5. The speakers are going to be used to watch movies in my family room. The front left and right speakers will be set on shelves. The center speaker will be mounted under the shelf that holds the plasma TV. The rear speakers will be mounted to the ceiling. The LX-4's and X77's have Linaeum omni-dirrectional tweeters. The LX-5's have Linaeum bi-dirrectional tweeters. What combination of speakers will give me the best sound? Should I purchase a Pro CS-5 center with Linaeum tweeters to use for the center speaker?