I currently have a Logitech Z-2300 2.1 speaker system that is faulty and I am returning and upgrading. Im thinking about the Logitech Z-5500 5.1 speakers, but they are $230 more. Would they be worth the difference? Or if anybody can suggest a system in the $200-400 range, that would be great. I'm not limiting my options to logitech or 5.1 systems. Any tips would be greatly appreciated.