I have more than one computer. I've had Avast 5 on Vista ever since it was in beta. I LOVE the Avast 5 GUI (never could get used to 4.8 GUI so I never used Avast more than a few days until the new GUI). I have said here, and at Avira forums many times, that I think the Avast 5 GUI is the best Antivirus GUI I have ever seen.
Having said the above though, in reading more just now about Avast 6, I don't want any of the new features. I just want a great antivirus program. I only use three shields on Avast 5 and I have zero interest in users rating websites. I turned that off in ver 5 and don't want anything that calls home or tries to rate sites in ver 6 either. Plus, I run it on a virtual machine already. I don't need virtualization within a virtual machine! Can I turn that off also?
I just want an ordinary antivirus program with the best detection of all AV out there. No gimmicks. No "fancy" stuff. I want outstanding real time detection as the file is downloaded to disk and that is it. I use the Proxomitron so I cannot use a second web proxy and don't need it anyway as I have Proxo for that. I just need outstanding detection in real time as a file downloads. Earlier this evening, I was playing with some nasties that someone at GRC NG had disguised one very nasty trojan to run piggback on another and he was able to trick a number of AV programs into detecting only the less harmful of the two and the second got through unharmed. So, I tried the tests and Avira passed easily by not being tricked and detecting the piggybacked zip file before it even finished downloading to disk. I didn't have the Vista computer running so I didn't test Avast. But according to VT it failed. It was tricked like McAfee, Microsoft and some others. I must say though that Avast fixed it quickly.
I'd like to use Avast exclusively. However, I have to use Avira because very little gets past Guard and that is not true for Avast or most other AV programs. Avast would do best to concentrate on its detection not on fluff features.