I did it the other way around, started with a MAC and went to a PC. DH uses a MAC and he's always buying things for it. Only money I have spent is buying a cheap laptop when I became laid up. MAC didn't have a cheapie one.
Seems to me DH had had to replace his motherboard and hard drive in the last few years, either that or he just HAD to have some new MAC doohickey.
Supposedly MAC's are easier to do graphics and yes, most viruses aren't written for MAC's, but in 10 years of owning a PC, and the last four with this little laptop, I've NEVER gotten a virus either.
Another draw-back I found with MACS is that since we live in a small town, DH has to go to a bigger city nearby to get his or his Mom's fixed, while I can get mine taken care of locally. I think MAC upplayed the virus angle so much, people think little gremlins live in their comps.
And, at LEAST once a week, DH's mom is calling him to come over to fix something on her computer. A MAC!