My PowerBook G4 17-inch has been great to me. I run it on my Dell 20.1" widescreen display and it's awesome. The only problem I had is that my original hard drive died. Thankfully I had all my important data backed up. Also I went from a 4200 RPM drive to a 7200 RPM one. The performance boost was great. 
Now of course I would love a Mac Pro, but a) can't afford one right now and b) not enough Universal apps are available (Adobe CS3 namely)
Now of course I would love a Mac Pro, but a) can't afford one right now and b) not enough Universal apps are available (Adobe CS3 namely)