Antiviurs for MacBook Air

I just bought a MacBook air and I'm looking for a good antivirus product to install on it.  I've used Symantec AV for years on my PC's but was wondering if anyone had thoughts on others as an  alternative.  What is the best av product out there as far as av is concerned?
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Is this for private use?
If yes ClamXav is free and should be enough.
Dave BaldwinFixer of ProblemsCommented:
A search for "anti-virus for Mac OS X" brings up all the usual sources.  Looks like almost everyone is producing AV for Mac OS X now.  I notice some of them only support 10.4 and 10.5 so check before you buy or download.
Here you can compare commercial products:

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