I would like help for upgrading both my DAP and my IEM. As mentioned my setup is DAP: Fiio X1 ii IEM: 1more Triple Driver Over Ear: Sennheiser HD 598 My budget is around 500$ (Canadian). This will be mainly for work and on the go so I prefer not to use open back. Will the new Fiio X3 iii be a good upgrade? Because my budget is limited I don't want to blow it all on one product. But I can be convinced. If I blow it all, I want to buy either a Shanling M3S/Fiio X5 iii. Or I want to buy a Shure SE425. Can you please help me out?