If wired Arctis 7 has that dual audio device thing with separate volume controls going on, I'd get that just because of it. Wireless Arctis 7 has it, really handy to have independent volume controls for TeamSpeak and game.
The earbuds that come with your smartphone are better price:quality ratio
don't buy cloud revolver II (bad sound quality) or Razer earshits (only price, not durable) by my own experience.
I got the Razer Blackshark V2 and i really like it, it feels very comfortable
Corsair Void is cheap and very good