Here is my response.Where better than a lab or experts testing all the major antivirus products. You say that isn't accurate..well then where is??? I disagree with you on that. I actually like Avast and especially as you say for free. I had Norton by the way and Nothing but problems on several machines I and my friends own with auto protect..so I don't promote Norton as someone suggested. I simply read that test results and was shocked that Avast failed. Several tech sites I participate in find that test site very reputable. Take care.
I ranked em with a 321 virus sampleset here:
http://forum.avast.com/index.php?board=2;action=display;threadid=5248Sicne then, i've done way more testing....
Picking an AV is a hard decision - LOL! I know! So test after test after test.. I've finally put every AV through almost 30,000 virus samples, i've tested everything from the companies responses to virus samples, to support issues, and even watched their definition response times. Its not ALL about detection, and depending on your tastes, and what you like/dislike, it could be something as simple as the interface or asthetics that are important to you! Hell, even *I* have trouble making these decisions, and would like some reinforcement sometimes!
So what I finally did, was assign numbers to each product based on where I feel they stood in the following catagories:
Support, Definition Response, Stability, Resources/Performance(hog=low, light=high), Asthetics, Detection Power
I decided to rate each product from 1 to 4 in each catagory, 1 being horrible, 4 being superb. So I went about each product, and assigned a number to each one, for each product. Then I took all of the numbers, and added them up for each product, and came out with a 'Total' number for each product. Then I came up with a list of them, ranked in order, based on this final number: (I decided to only include the top 15 scoring products in detection on my virus test runs)
1) Kaspersky 21
2) eXtendia AVK 19
2) F-Secure 19
2) BitDefender 19
3) MKS_Vir 18
3) CommandAV 18
3) F-Prot 18
4) GData Avk 17
5) Virus Buster 15
5) Panda 15
6) DrWeb 14
6) ETrust 14
6) Avast Pro 14
6) AVG Pro 14
7) KingSoft 13
7) NOD32

McAfee 12

Norton 12

Trend 12
Now lets keep in mind, some scored very high in one area, and low in others, and this brought down the score... For example, AVK scored horrible in "Support" because they offer almost no technical support. But if support is a non-issue for YOU, then you can discard this number if you want, and look at everything else, and in that case, AVK scored higher! Here is how they broke down for each product.
(in no particular order)
Numbers rankings are in the order as listed per catagory below:
Support, Definition Response, Stability, Resources/Performance, Asthetics, Detection Power
So for example, MKS was 2-Support, 3-Definition Response, etc...
---------------------------------------------------------------------------------------
MKS_Vir 2 3 2 4 3 4 - 18
eXtendia AVK 1 4 3 3 4 4 - 19
Kaspersky 4 4 3 3 3 4 - 21
McAfee VirusScan 1 1 2 2 2 4 - 12
F-Secure 2 4 3 2 4 4 - 19
GData AVK 1 2 3 3 4 4 - 17
RAV No longer available.
Norton 1 1 2 2 3 3 - 12
Dr.Web 1 2 3 3 2 3 - 14
CommandAV 3 3 3 4 2 3 - 18
F-Prot 3 3 4 4 1 3 - 18
BitDefender 2 4 3 3 4 3 - 19
ETrust 2 2 2 4 2 2 - 14
Trend 2 2 2 2 2 2 - 12
Avast! Pro 4 1 2 2 3 2 - 14
Panda 2 2 3 3 3 2 - 15
Virus Buster 2 3 3 3 2 2 - 15
KingSoft 1 1 3 3 3 2 - 13
NOD32 1 1 2 4 3 2 - 13
AVG Pro 2 1 3 3 3 2 - 14
Consider that Kaspersky, AVK, F-Secure and BitDefender are really close, and each has their own strengths and weaknesses. AVK for example, has a way better interface than Kaspersky, but AVK lacks any measure of technical support. BitDefender took a slight hit in support area, but overall is a solid, stable product, that gets definitions pretty quickly. F-Secure uses KAV definitions, and backup engines, so of course it detects great, the interface is great, but it gets some lower marks on support, resources and some minor stability.
Thats it, thats my final rundown, make your own decisions, or use this as a guide, its all up to you in the end. Best of luck.