I find the Bass module to be more important than the surround speakers. While you get more direction from the surrounds, the 700 does a great job as it is. I also feel the Bass gives you more "feeling" so even if the bass isn't turned up to max you still feel the engine roar, the gunshots etc. As well as that it provides more depth for music and soundtracks. The surrounds work best when you have good quality signals go in. So if watching 5.1 from BD disks, it sounds great. If you're watching standard TV with stereo sound, you don't get much from the surrounds.