We were lucky enough to see Väsen recently in Edinburgh. They're famous for their Swedish folk music and for featuring the nykelharpa. However, make no mistake each member of the 3 strong bad is an absolutely superb musician. They have been on the road for 25 years together and they are really tight as a result. An absolutely amazing performance. I think they must be one of the best folk bands in the world just now. It was a small venue and we were literally 3 feet from the stage. Very inspirational. If you don;t know them check them out.
They have a DVD out but it does;t seem on Amazon yet. However here is a link to their album Gront - worth checking out. Here is one of their videos on Youtube too. Enjoy.