Looking for a good surround sound system

My current sound system is a Logitech Z-680. I'm looking for a newer surround sound system to replace it as this system is starting to show its age. I currently own a Playstation 2, Playstation 3, Xbox 360, Nintendo Wii and a PC with a Creative X-Fi Xtreme Gamer sound system. So this system would of course be used to watch movies/play games on the various systems.

My room isn't huge, its roughly 10X14 give or take so I don't need something that's really expensive, just something that will sound good when I put in a blu ray movie or load up Call of Duty 4, something that'll make me go "wow, that sounds amazing!" I was thinking about the Logitech Z-5500 but was wondering if you guys had any other suggestions? If not then I'll go with that system.