I am stuck between these two, Which one would you choose for dance/trance/techno ?
what type of sound signature do these have ?
Both are good cans for your genres. Their sound signatures are similar. The HiFi 780 is closed and doesn't need an amp. The Hifi 2400 is open (although it does not leak much for an open design); requires and amp and is of superior build quality--comparable to the close Pro 750.