George,
I own a KP-100, and I have tried the KP-200. IMO neither are worth the money, wholesale or retail. The quality was marginal at best, the speakers are garbage and easily blown, and if you open the case you will quickly discover there isn't $100 in total component parts inside. The only reason I keep the KP-100 is that it fits in the van with the other equipment and can be used in a pinch as a backup. It does not come remotely close to the sound quality of the Logitech Z-5500 system. Dan01 was selling them when he worked for Piano Man in Catonsville, Maryland, I hooked my PSR-3000 up to the system, and to me, it sounded just awful. At the time I was still using a pair of Barbetta Sona 32CS powered speakers, which were far superior in every respect.
Just my opinion,
Gary
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Travlin' Easy
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)