Thanks guys. Really appreciate it! I also appreciate the ideas on how to make the reviews even better. I will go through the list of possibilities and see if any are viable options later. No guarantees as I like the format as it is right now. High, med, low. With only "apples to apples" comparisons. BUT please keep the ideas rolling in.
The plastic top is also a built in cowling to keep air from going UP and over the fin array rather then through it. The side plastic pieces are what keep the fans in place. Makes swapping out a fan VERY easy. So while yes there is a LOT of plastic its there for a good reason.
These are the new S4 fans from CM and you can consider them a "FDB upgrade" to the R4's that are available darn near everywhere. I would not be surprised if in the near future you can buy these beasts separately but have no idea one way or the other. IF they do become available it will very nice as the bearing was the ONLY "less than" part of the S4 fans! With that being said I doubt you will be able to pick these up as cheaply as the R4s go for ;)