I have Avira Premium and done a lot of testing from sources listing bad sites, installs etc. And yes it is good but not close to perfect. If you click on everything that moves or just want to hunt down 100% detection rate you will need more, like WOT
http://www.mywot.com Many sites offering crap not detected by AV will be blocked. Easy to prove it is effective - beats WebGuard from paid Avira easily. Also compare to SiteAdvisor or Norton as you please. Does not really matter which you use, Avast is fine too. All should have help from other tools even if some try to make you believe it is only a matter of prolonging paid subscription. Dont fall in love with Aviras high detection rate but then again why not use the best?, see last few years test from AV-Comparatives. False Positives are now also under control though that site does not always agree.
2 things about Avira I dont like. 1. You only get license to 1 pc, not 3 in a household = price not that dif. from products not making you think Win98 and 2. Avira Premium does not disable Windows Defender like Norton/Mcafee? but unofficially they highly recommend it. Defender is built into OS and it dont make sense to turn it off. Part of the war about your $$$ I think, more so than a technical one. Microsoft will soon release free AV product, then they take over this business - or so some will be afraid of. Too much work adequately out of the box! Firewall, Antispyware, Antivirus, can even add parental control! Now IE8s smartscreen filter even kicks in, will WOT also be redundant? heh. Then comes the better security features in Vista and upwards. They will have to make up new demands then, has never been a problem but must be getting tough. Avira do give thumbs up to Defender in free version - may be good argument not to use paid?
Danger of a big fat utility-suite is you think that was it, hardly anything left to do - besides I paid money for it. Or you dont really know what is running, which threats/defenses are make believe, which are for real. xxxxx product protects me. When things go wrong or you just have to make a decision you will be ???? May be better to say there are advantages of being aware of those "layers" mechBgon talk about. Security is more about being aware than buying/using products - or changing software every other 2 weeks because a new "test" has arrived. Not what part of the security industry want you to believe.
No chance I could be bothered with SRP, and definitely not NoScript, but I see common sense in most entries from that guide. Think you should say yes, yes I know to most before paying for Mcafee or other tool. At the end he list Malwarebytes, SuperAntiSpyware. Non resident extra scanners. Can add onlinescanner from Kaspersky, ESET, many others - not like there is a lack of free tools.