Macs are "PC's". . . I don't buy into image marketing.
If you are getting infections on your computer, you are doing something wrong. Macs are no more immune to viruses than windows machines, they simply have a tiny market share, and there are less people writing malicious software for them. Apple recommends that you run AV software on their machines.
I have used Macs a bunch, and they are fine machines.
Personally, I prefer windows to Mac OS, and I like to play games. Mac PC's are very expensive. My new desktop computer cost less than 1/4 the price of a mac tower with similar specs, but faster and with twice as powerful a graphics card.