I posted a thread on the similarity of the PowerBook G4 and the non-unibody MBP here- http://forums.macrumors.com/showthread.php?t=696361 Now I am wondering if, when somebody sees your PMG5, they mistake it for a mac pro. They might not, because of the howling fans, the buzzing that sometimes happens, the 1 Optical Drive tray thing and the Liquid Cooling. On a side note, Does anybody have more than one PowerMac? Example- Dual 1.8 G5, Dual Core 2.0 G5. Dual 1.42 G4, 450 MHz. B&W.