I've been wanting to get the Air but it doesn't have a CD/DVD drive which I use ALL the time, I'd have to buy an external burner since it seems I'm forever burning something for someone.
My warranty is up the end of December and it'll be 3 years old, a dinosaur by computer standards ha ha so I might consider an Air then, just because LOL.
I agree a Mac is more than worth the cost! I've still got my Dell but haven't turned it on in almost 3 years. I'll never have anything but a Mac again.