By walterbays on Aug 26, 2007
So I searched with Google for "violin concerto" and "technically difficult" and Mendelssohn popped to the top of the list. I typed the name into iTunes, quickly verified it was the E minor, and was presented with many recordings of it. I listened to the preview clips of them until finally I narrowed it down to two interpretations I liked most. One was by Itzhak Perlman. The other which I finally chose was by Zino Francescatti, a French violinist I had never heard of before, playing with the Cleveland Orchestra.
I never could have done anything like this in a physical record store. They might have had three or four recordings of the concerto, but not so many, and surely not including relatively obscure performers.