I'd always heard AntiVir was good; I think it was one of the main two or three I was considering before switching to avast about a year ago. Maybe I'll try it one day. For now, I think I'll stick with BitDefender as my backup a-v. It seems to be doing okay, so far.
I do consider my anti-trojan software as critical, though. FreewheelinFrank, you're right, Ewido's scans, in terms of time, do approximate an a-v scan. I guess I just accept that as normal; and, as I said, I don't mind the extra time it takes. An Ewido scan is available from the right-click context menu in explorer, so that makes it easy to do a quick check on downloaded files.
It's
very rare that either Ewido or a-squared find anything. But, since they're free and also don't cause any problems for me, and are specifically designed to detect trojans, I feel they're valuable tools (along with anti-spyware, etc) in my security toolkit. Maybe I'm kind of paranoid, but I'd rather be paranoid than infected!
