Well guys I didn't get them after all. I heard them and liked them too but the guy in the shop said the price he had given me was by mistake and not €850 as he said but €1050. I couldn't go that far. So I went to another dealer who sold me some used B&w CM4 in 'as new' condition at half of the price of the Concertinos. My first impressions are positive but I only got them today so I need to live with them for a while b4 judging them. It wasg good riddance to my Quad 12L's though!