Beethoven's 5th Piano Concerto, late Mozart Piano Concertos..pretty "big" sounds and great music in addition to those listed already. To see how "big" a sound can come from a string quartet--Beethoven's Op 130 with the Grosse Fuge. (some of the best music ever written, Beethoven's late quartets). I guess I feel composer is more important than size of sound.. Good Luck!
