OSX is great. If they would let me go Mac at work, believe me, I would in a heartbeat. I have a 17" iMac and a 12" PowerBook, and both are great machines. My only complaint about the PB is it runs pretty hot, but then again, so does my Dell
I have Office for Mac installed on both machines, which allows me to use Word/Excel/PowerPoint docs between PC/Mac. The only minor differences may depend on what fonts you use.
I have mine connected to a wireless router (the way to go), and have our PC's and TiVo connected to the network as well.
OSX is rock solid. The iApps are great (iTunes, iPhoto, iMovie, iDVD).
I don't use Outlook or Entourage, opting instead for Mail and iCal.
I use Windows at work because I have to, I use OSX at home because I like to
