For MAC there are a few free AV solutions worth considering Sophos is arguably slightly better than AVAST and Avira is also worth considering.
Nothing wrong with trying out another option but if ClamXav is doing the job then it is up to you if you want to try out another solution.
Malwarebytes Antimalware for MAC is a good on demand scanner.
Some argue that an AV on a MAC can cause issues with the MAC OS built in security and with good browsing habits you should be good without a resident AV.
Thanks for sharing your MAC config