I would get hte Klipsch Promedia ultras if I were in the market for speakers again. I hav the 680s little brothers, the 560s. They are the exact same speakers as the 680's minus the center channel and DD encoding. These speakers are great for the price, but the quality of them are average. I really dont like the highs on these speakers, they sound muffled out and are no where near the ultras speakers. The sub in the ULTRA will blow the 680's away also b/c its so much more balanced and smooth. The logitech DOES have a lot of power, but its not nearly as detailed and smooth as the klipsch ones. I know the ultras cost more, but trust me, they're so worth it for pc speakers. Im gonna buy a pair later on this year heh.