Ultrasone signature pros have great sound isolation. And they are an excellent headphone .I modded them to dual exit for balanced .and if you arenpatiareyou can get them for under $800. Awesome. Love them. Not as good as the 820 but my go to around town in 2.5 balanced on my ibasso dx150 w amp 3 .great combo on Street, subway, or office .and they fold up nice .