i would say go for it! one of my roomates is the tech apple campus rep and he has a G4 powerbook which is very very cool.
for example, one day i was having internet issues with my comp so i borrowed his laptop and all it took was two mouse clicks to setup his comp as a router using the wireless setup we have here (keep in mind this is also while mixing macs and pcs).
Plus the OS is very good IMO. Very very stable, more so than XP IMO and also invulnerable to viruses, with the exception of the half dozen or so NIX viruses

. Plus they just work. in my experience with Macs they just don't have problems like pcs do. also the hardware accelerated gui is nice.