You will basically only have to worry about a virus in WP and Excel files. Pretty darn rare to find an email virus that will effect your Mac, if at all.
I beg to differ.
I've been a PC person from DOS3.0 and I have used everything up to and including Windows 8. Good backup routines have saved me from the two viruses that struck my windows machines. Recently I was given a Powermac G5 and I started from scratch, wiping the disk and reloading the operating system from the original system disks and then getting all of the apple updates to bring my system up to 10.5.8 (the highest I can go on the power pc without the intel processor). Somewhere along the line it was infected with a virus called "flashback" or "flashfake" and I had to start from square one. I grant you that there are many more viruses for the PC than for the MAC but I find it very interesting that back in June of this year apple changed their website from saying "doesn't get PC viruses." to "It's built to be safe." and they changed another part of the same page from saying "Safeguard your data. By doing nothing." ( A statement that sounded ludicrous to me) to "Safety. Built right in"
http://sophosnews.files.wordpress.com/2012/06/mac-osx-before-after.jpg
There are things about Mac's that I really like, for example their GUI is really nice and since there are very few apple clones, they don't have the issues of flaky drivers and poorly designed peripherals like the PC does. However you do have to pay a premium for that luxury.
The debate will go on forever with each side claiming that theirs is the best system and I doubt we will ever get around that but there are some facts that cannot be disputed.
1) There is viruses for both the PC and the Mac.
2) As mac gains a bigger share of the market it will also become a bigger target.
3) A good backup routine is a must if you cannot afford to lose data.
4) Most viruses can be avoided with a good antivirus program and common sense.
5) A false sense of security will bite you in the butt every time.
6) Follow the Boy scout motto "Be Prepared".
7) Learn from your mistakes or you are doomed to repeat them.
Although I don't use the Mac as much as the PC I have not had another virus since I installed a good antivirus program and became more leery of what I install.
P.S. As to PC laptops, I have always had very good luck with the IBM thinkpads and Lenovo laptops. I still regularly use an older X31 laptop that I purchased in 2004, It's not the latest and greatest but it is a reliable workhorse.