For Mussorgsky songs, I strongly recomend Sergei Leiferkus cycle on Conifer if still availible - stunning is the word. For the "pictures" - I cant seriously recomed Beroff as I have not heard it, but I hardly think that it can better Nikolai Demidenko on Hyperion or the famous Sviatoslav Richer live recording made in Sofia 1958, but with the latter one has to stand both an appaling audience and som realy lousy sound quality... Peter