Does any one know the difference between the CS400 and CS400i? I have Polks from the previous generation, specifically RT800 for the front, RT55 for the rear, and a CS350 for the front. I considered trading the CS350 in on a CS400 a while back, and now with DVD-Audio looming in my near future I kind of wish I had since it can go down to 50Hz vs. 60Hz for the CS350. Since DVD-Audio players so far don't have bass management, this concerns me. I'd actually consider the CS1000p for this but I hope to move to Martin-Logan's in the not so distant future, so I'd hate to invest that much on a center channel now. The CS400 should in theory be a near perfect match for the RT800 so I'm curious as to how well the CS400i would match up.