I upgraded from a Logitech G402 to a Razer Deathadder V2. Considering these are popular options under 4k, AMA and I will try to give you my 2 cents. : r/IndianGaming
Razer DeathAdder V2 review: A workhorse for serious gamers | ZDNET
Amazon.com: Razer DeathAdder Elite Gaming Mouse: 16,000 DPI Optical Sensor - Chroma RGB Lighting - 7 Programmable Buttons - Mechanical Switches - Rubber Side Grips - Matte Black : Video Games