@mushjoon I didn't meant that you actually buy old Yamaha NS10 but a modernised copy of it Avaton CLA-10 and now they have it and in active version CLA-10 Pro but I don't know how good is the amp in those (probably worser than AB one's Yamaha puts in their).
I hope you are wrong about Aurvana Air regarding selling on Amazon used to buy mine there and on second pair right now.
Overlay sound picture is similar but not the same between NS10 and Aurvana Air.
Used to do a lot of garage gigs and demo recordings when I whose younger. Still it will be a lot of hard work for you.
AKG K371 is what it is and it won't last you for long time (earbuds will at least 3 years).