I recently purchased the Gamecom 388 for 2.5k from flipkart. Even my main purpose is CSGO. It's a great VFM headset. Clear audio and amazing microphone with noise cancellation. Using it with Razer surround and 5.1 speakers in game audio settings. Works great.
Razer Surround is a software by Razer which can help you get virtual surround sound experience from any headset/headphone.
Considering the fact that my apartment is right at the intersection of a busy street, the isolation is good enough that I can't hear any horns/other noises when I'm in-game. The microphone's noise cancellation feature works great and it only picks up your voice and nothing else.