How long will it be before there is no such thing but and open source AV? There is just no way a closed source AV will be able to adapt as fast as the virus-sphere. especially when you read about these highly targeted Trojans coming from China and Russia. http://www.securityfocus.com/news/11222 I have Clam AV on an Astaro box (linux based UTM) and I've always been pleased with the perfromance.