Not exclusively Russian, but orthodox lithurgies like they are done in slavic countries can be wonderful sound and music, same is true for Gregorian chants that also are done in the slavic culture. I also like some of the music by Russian soldier chorusses and that kind of music program. these chorusses truly have full and sounding - and male! - voices. Should make many so called popstars and pop-wannabe-singers ashamed of every dollar they earn by selling their albums with their strange and queer sounds. No way I will ever accept a squeaking, puffing thing like Prince as a member of the human race.
Hm, the title music from Red Octobre and the soviet national anthem also are sounding great! So do parts of the russian classical composers. Rachmaninoff: 3rd piano and Prokofiev: 1st violin concert and Tschaikowsky's Four Seasons are some of my favourites in the field of classical music.