Really need yourhelp guys. I ordered the x2 just in case it gets sold out. Im in the USA. Will it complement my hd650. I dont want to have 2 expensive headphones that sound similar. I my mind, the hd650 and grado are opposites in some ways. If it helps, I have a fiio x3 I use with e12a amp for...

Hi, I've had a HD598 for a few years now and love it. Finally bought a x3ii last week and is on the way. I want to get an IEM to use outside. I have narrowed it down to shure 215, hifiman re400 waterline and sennheiser momentum IEMs. I would like some sound Isolation as I would be in library...