I am trying to decide which components to get. Infinity kappa 6.1 perfect, or Infinity kappa 60.5cs. I have read several reviews and they are really mixed. Some say the perfect system is worth every penny, some say the 60.5cs system sounds much better. One commun complaint with the perfect system is that the tweeters sound metallic. Any experience or information? One more question. Where is the best place to mount the tweeters? Cut a hole in the door panel?