This guide essentially covers headphones and In-Ear Monitors (IEMs) under Rs 6,000. That's the amount of money most average users are willing to spend on these products. Those with deeper pockets are hardened audiophiles, who don't frankly need much help to begin with. Another thing you will notice about this guide is that you won't find any relatively well-known brands here. For a good reason too!
I don't advise opting for easily visible brands, if your budget is under Rs 3000. Well-known manufacturers are too bloated with greater operational overheads to offer decent audio fidelity in the budget to mid-end IEM \ headphone segment...