Chalk up another Mac user. My migration path went from Windows to Linux (various flavors, but ultimately I settled on Ubuntu) to OS X. The tipping point for me in moving to the mac was that I wanted a laptop, didn't want to run Windows, and didn't want to fight with drivers (granted, it's getting better, but I've had a few too many run-ins with oddball laptop hardware drivers for Linux). I use Pages and/or Latex for my documents, OpenOffice (well, the Mac port, NeoOffice) when I need to open MS files and various other combinations of free and non-free software. If there's anything specific you have questions about, let me know. My only problem with running the Mac is that I'm a webdesigner, and checking sites for IE compatibility is awkward at best. Other than that, the MacBook Pro is a great machine. I might recommend waiting until Spring if you can, since that's when OS 10.5 (Leopard) is scheduled to ship on new macs. If you can't, 10.4 (Tiger) is still a great OS.