I found a pretty good local deal on some Polk R Series Speakers (R40, R10, and CSI 175) and was wondering if I could use these speakers on a receiver that was sold as an HT in a box? I currently own a Sony HT-DDW840 and it came with the small satelite speakers, center, and sub. The receiver is rated at 100watts per channel, so would that be enough power for the Polks? I would use the Polks in conjunction with the Sony sub that came with the 840. Would the Polks sound better? Any potential problems?