I mostly use CNET for software reviews, popularity, download numbers and ranking. I use both CNET’s review and users’ reviews.

Version: 6.0 [b]Date added: February 23, 2011[/b] Price: Free to try (30-day trial); $49.99 to buy (Buy it now) Operating system: Windows 2000/XP/Vista/7 Total Downloads: 992,506 Downloads last week: 6,512 [b]Product Ranking: #4 in Internet Security Software Suites[/b]

http://download.cnet.com/Avast-Internet-Security/3000-18510_4-75095376.html

If you look at their rankings for 5.0.594 which has been available for quite a while you get

Version: 5.0.594 Date added: July 01, 2010 Price: Free to try (30-day trial); $59.95 to buy Operating system: Windows 2000/XP/Vista/7 Total Downloads: 399,041 Downloads last week: 19,375 [b]Product Ranking: #1 in Internet Security Software Suites[/b]
[url=http://download.cnet.com/Avast-Internet-Security/3000-18510_4-11438767.html] http://download.cnet.com/Avast-Internet-Security/3000-18510_4-11438767.html[/url]