I participate in a Russian independent tests, and i see that ESET has a higher detect! But we used only the LATEST viruses. Avast weakest of the most popular in the search for new types of viruses. And to have a rather long response to the virus sent (more then 24 hours). But it catches up after 24 hours.
But the rest of it better than others and very quick and beauty!
I use the free Avast and test it, send viruses. I like its low load on the system!
If the detector will be increased in version 7 with preservation of other characteristics - I would definitely buy Avast IS!