Am currently in the porcess of upgrading my speakers and although I only use 5.1 at the moment, I want to replace speakers with a 7.1 setup so that I have matching speakers ready for when I have a larger living room! I'll be honest I've always struggled to get my head round the reasons for and against using conventional speakers as surrounds, or using di/bipole surrounds. Now I was in a branch of Sevenoaks today and was told by the salesman: In a 5.1 setup in a medium sized room, use normal speakers as surrounds. In a 7.1 setup, use 2 pairs of di/bipoles. He was very clear that this was the correct strategy for each situation. Is this a generally agreed viewpoint, or is this just made-up salesman talk? Any comments much appreciated. I should perhaps add that I listen to quite a lot of multichannel music, not just movies.