Check your wires, they can be an issue sometimes. I've got a 6.1 surround sound and one of the wires go loose to one of the satellites, threw off the whole experience . But I found the little sucker.
What are you using these speakers for? Your computer? Seems solid, and looks like it'll give you good sound. 200 watts of power looks good for that. 4 of my satellites at 60 watts each, with 100 center. Big old subwoofer too. It's got dolby digital, so I've got my tv, video games, and computer all hooked up to it. But, it depends on your room and its usage.
One thing that bothers me, is that with the increased clarity of CDs and the new power of speakers, nobody seems to really care about sound quality anymore .