I of course understand your clear point, I just feel the need to clarify your opinions further.
1. The new perpendicular 5400 rpm drives are just as fast as a 7200 rpm drive atm. Hell, even the 200 gb 4200 rpm is faster at disk reading and writing when it's filled with the adequate amount of data. Why do you feel the need of a more battery consuming and heat producing drive?
2. There is quite a difference here, seeing that the new Superdrives support dual layer burning, thus being above par on the burning level with your old Powerbook.
I do understand your reasons coming from a Powerbook. Had you had an iBook or an older model the reasons would probably have been different