CCD vs CMOS, is a LITTLE bit like LCD vs Plasma. They are based on different infrastructure. The post-process in camera algorithum is also going to affect the final output.
As said, the d2 series is the professional series. Which is addressed by raptor.
If you noticed, the h series is having lesser MP then x series. Each has its own goodness. The h series is more to sports, where fps is of concerned. Remember, lesser the MP, faster the processing.