Welcome aboard! ... In my view, the CKS1000 overall sound quality is quite a bit better (yes, this JVC fanboy typed that) than the FXZ200 and FXZ100. The 200 has more quantity of bass, but the CKS1000 has more quality of bass and of overall sound. This doesn't mean at all that I have fallen out of love with the FXZs. But dynamically, I have heard nothing that beats the CKS1000 to my ears accept for the ASG-2, which I expect to have the "updated" ASG-2 and AS-2 soon. Happy listening!!
Yes, I'm also curious about how the WS99 and the CKS1000 are to each other. That may seal my fate on the WS99. And I'm digging the CKS1000 so much that I've finally (today) just sold my beloved W4!