What anti virus should I get?

[DukeOvilla]

I used to use Avast, which I loved with all my heart and sole. But sadly, Windows 8.1 is not yet compatible with it. So, for the time being, I must use something else.

I took a loot at Avira. But NO WAY NO HOW WILL I USE MSE!!! MSE IS UTTER @#$%!!!!
I hear spooky things about AVG.
I already have the free versions of MalwareBytes and SuperAntiSpyware as backups scanners.
Norton and McAfee are out of the question.
is there anything else worth looking at?

EDIT:ALSO..

Is avast or avira more lightweight???

 

[MC_K7]

Avira is very, very good. The interface is user-friendly and it's one of the best for detecting viruses. In my book this is the best free anti-virus.

Bitdefender seems to do even better. Considered the best currently by many reviews (based on av-comparatives.org and av-test.org for example). But it's not free (only 30-day trial).

I have 3 computers at home, 2 running Avira and 1 running Bitdefender. I have purchased licenses for all of them. So far I consider both of them lightweight and non-intrusive. They both have a "game mode" if that matters to you (not available in Avira free version though).

 

[DukeOvilla]

Thanks! I've heard plenty of good thing about avira. Considering it has one of the absolute highest detection rates, I might just keep it. You see, I believe a good anti virus doesn't let anything in in the first place. I'll install avira, and set the real time protection heuristics to max.

 

[MC_K7]

You see, I believe a good anti virus doesn't let anything in in the first place.

True. But keep in mind that no anti-virus has a 100% success rate in heuristics and day 0 threats. In the end, the user has to be careful what he does.

For extra security, I use the No-Script add-on for Firefox. I also use a standard user Windows account for everyday browsing. Of course, I have another admin account when I need to install software.