For those who are thinking of switching to the Mac, take some time and do some research first. Find out what software you'll need in order to keep your business running smoothly during the transition and price it out. Remember, Google is your friend with any issues that you may have.
Also, pick up a book (and read it) to familiarize yourself with the Mac OS system. This is a good one:
The Mac is a great system but don't expect it to run like your PC. There is a learning curve involved and depending on how much time you put in to it, it could take from a few days to a few weeks to feel comfy....even longer for some folks.
There are a lot of Mac users here at GFY and they'd love to help you make the switch/adjustment. All you have to do is ask if you have an issue.