Q: best antivirus for mac

Hi, please suggest best antivirus for macbook air core i5. I am using norton as of now. it is going to get expired soon. I am

handling company emails and receive a lot of junk emails with attached trojans and other malware and spyware etc....

I need an antivirus which can be best for internet as well as scanning and cleaning malware related files and data. I have in mind Intego........

I know that viruses do not harm mac but i want to protect my data from spyware and malware.......

Thanks!!!!