I'm listening to Genesis "Selling England by the Pound" on Bluray Audio in 5.1 right this very second... STUNNING with zero issues in timbre and this is critical listening in music... not movies.
Much more critical in my mind.
But once again, if you run flat, you probably wont like it... EQ it effectively and it works perfectly well.
Is it easier to just get the same "line" of speaker... probably. Does it work effectively, absolutely.