It's maybe come up before, but I only found one thread on it and it was more about size than anything. I'm wondering what the differences are between the two, outside of their physical features. I've read that the 5500s are digital vs analogue for the 5300s but what real difference does that make? I'm getting an X-Fi, so wouldn't that be able to convert between the two signal types? What makes the 5500s $150 more? I know it has a prettier remote and a slightly more powerful woofer but practically, does this account for the price difference in real-world gaming/music?