About ANHC has best horn or not. When people suggested me to change it. I went to Karol Bag Market, Delhi. Had discussion with seller/shop owner he suggested me sir dont change your horn. That is best horn for highway than others it and that I felt it too. I went to change my horn to Skoda type. Even he showed me and agreed to install if I insist more. I took his words and didnt installed it. I drive long distance highway trips with family mostly and I felt my presence on road enough to overtake at high speeds.
Not used other cars so cant compare personally but as per my knowledge ANHC has good horns. (I know most of will not agree to it.)