I have a MBP 2.16 CD (not C2D). It has a 7200 rpm HD. I was considering an OWC mercury drive, but I'm not sure it's worth it in an older machine. The thing is the sata is limited to 1.5 gb, not 3 gb as in later models. Would there be much of a speed boost? Since it's a year out of AC, it would be fun to open it up and have a look inside.