Uh... don't really need either. Spyware hasn't been an issue for Linux (because of the way that Mozilla/Netscape et al. operate). Anything that attempts to install from the web via an .xpi requires permission usually and a popup will ask you if you want to install it. IIRC, there is only one known spyware for Mozilla.
ClamAV has been getting fair attention here at AO so that might be one to try. I personally haven't put an AV on my Slack box yet (or my FreeBSD box) as I don't know if it is really worth it at this point in time. There are a few viruses out there for Linux but they tend to be distro specific.
IMO the purpose of *nix AV is to protect your windows users when they access a *nix box via samba or other method..
I think hogfly is right on target with that comment.As MsM pointed out there isn't much of an issue with *nix, but I suppose it is a good idea to stop yourself "passing anything on" to your Windows friends.
If you cannot do someone any good: don't do them any harm....
As long as you did this to one of these, the least of my little ones............you did it unto Me.
What profiteth a man if he gains the entire World at the expense of his immortal soul?