Thanks for the info on the fans in the Dragon.  I think there is a bit of confusion because it seems to me after taking them out that one fan is heavier (and more powerful) than the other. 

Seems like the big fan in in the middle of the machine (prob 200+cfm) and the other is more a regular high speed (130+cfm).  I think this is because one fan hits more blades than the other.  I have not replaced any of them yet, but may in the future if I can find some nice high speed fans that aren't very loud, and hopefully can cool even better than the ones it came with stock. 

The price on these are very good, so I am sure they had to save money on some parts sacrificing cost for decibel level.