I don't have it but Charlie Musslewhite { Blues Harp } used to record with a string quartet - you might want to check it out for ideas. Lyle Lovetts cello player does some real interesting things. And if you ever want to try out the wonderful world of fretted instruments { after you've mastered the cello} the octave mandolins and mandocellos are tuned to the same intervals. The Modern Mandolin Quartet has recorded some great stuff - check em out.