Though smartphones can be used to listen to music, they can't compete with high-end music players. Toward the top of that list is Sony's NW-ZX707 Walkman.
That depends: proper Shure IEMs usually do a good job covering ambient noise. Somewhere north of 200 USD you usually get proper in ear monitors… but only if it’s from one of the regular professional equipment brands, otherwise you’ll probably pay for design or the name and little else.
It also won’t matter once you take a step outside; slightest ambient noise is enough to kill most of the advantages a high-end source provides.
That depends: proper Shure IEMs usually do a good job covering ambient noise. Somewhere north of 200 USD you usually get proper in ear monitors… but only if it’s from one of the regular professional equipment brands, otherwise you’ll probably pay for design or the name and little else.