Binos
If you're serious about switching, you should take Towers' advice and visit the Apple 'Switch' web pages as a first step.
If you do make the decision to switch, there is a wealth of resources and information out there for Mac newbies, PC-experienced or not. However, as an experienced PC user you'll probably find that, apart from learning a few minor ergonomic differences, you'll be up and running in no time.
One essential buy with your new Mac should be
'Mac OS X - The Missing Manual' by the wonderful
David Pogue. Humorous, infomative and £20 or so very well spent.
Additionally, there are endless (and free!) web resources out there to help you - a few of the best here:
Apple's own Support Discussion Board - great place for questions answered quickly by Apple staff or knowledgeable contributors
Macosxhints- Tech news, support and insight, from beginner to Unix Ubergeek level
Mactopia- Microsoft's Mac site
DotMac.info - Place to share your iLife stuff - photos, movies, blogs etc.
On top of all this, there is an extremely friendly, helpful worldwide community of users (including the handful of Mac Mujahedinis here on PPRuNe) willing to offer a helping hand - Australia is particularly strong in this respect. Good luck and let us knew how you get on!
Jx