As above +1, long time Grado SR80 user and despite owning many headphones over the past 10 years that cost 5 times as much i find myself using the Grados more often than not purely because i enjoy the listening experience much more, a good source is key obviously and if you do listen to rips then a high bit rate is preferred otherwise you will hear artefacts.
The Bowers + Wilkins P3 (or P5) are very capable as well and rather better for “public” listening, very well made and rather a premium looking product compared to the rather utilitarian Grados but for sheer pleasure you’d be hard pushed to better the SR80’s for musical enjoyment, pair them with a suitable headphone amp and they’ll fly – i prefer to use my Ray Samuels Predator Dac/Amp with my Grados but it is not strictly necessary to do so.