I would like to install an antivirus on my Linux server (running as NAS).

I found several free antivirus solutions, some are out of date, thus I kept AVG (now free for personal and commercial use) and ClamAV (which is OpenSource).

Do you uses (or have tried) one of these solutions?
Do you know which is the best?
Do you have some advices?

I would like a solution that moves infected files to quarantine folder, instead of delete them.

Thanks for your help!