Dowwnload, Firefox browser. Some government (an other websites) still don’t support Safari. Firefox will let you navigate and fill out forms.
Download Flip4Mac. This will allow you to play audio/vids that may be coded for Windows only.
Download DivX. A good format for watching streaming movies.
Buy an external HD to plug in occasionally for the TImemachine back-up. (you don’t want to lose the extensive iTunes library that you will, no doubt, accumulate.
Get the Mac, don’t look back. It’s the best computer money you’ll ever spend.
Full-up Airport WiFi hub and a TeraByte (or half TB) of backup storage that runs backups automatically via Time Machine. Tell it how often you want backups -- and forget it. Or, if you want backup RIGHT NOW, tell it to "make it so"...'-)
That's how I'm FReeping at this moment-- wirelessly and kicked back in my recliner (with my MacBook Pro...) And I backed up a huge graphic presentation (on archaeology) I'm developing -- during dinner.