I have been faithful to AVG for a number of years, but, I have to say that I'm not a big fan of v.8.
It frequently fails to update - and takes ages to perform scans - it also makes the system come to a crawl whilst scanning..
I have just converted to Avira (literally just - since Sunday to be precise!) and, up to know, I am suitably impressed. Various websites sing their praises and the detection rate is one of the best - and much better than AVG.
I did worry a little when I saw that it didn't have an email scanner but was comforted by various reviews stating that it wasn't strictl