The EX brakes are not much larger... 240mm vs 262mm...
I'd rather spend the money on a BBK... Besides, how much does this conversion cost?
To me, the difference is not that noticeable, I do have an EX that I can compare to...

Also, concerning the difference in the size of the rotors, are the calipers the same between the DX and EX?
It's weird that they don't sell the BBK's for DX models, leads me to think the relcation brackets are designed for the slightly larger EX model brakes and not the smaller DX brakes... Anyone know?