Buy it on: Amazon
This little guy looks unassuming, but let me assure you, it will do everything you need it to, especially if you don't require the flash of RGB focused models.
You get comfort, plenty of button options in a minimalist design, and best of all -- extremely responsive wireless gaming. I could gush about this one a lot, as this is my personal gaming mouse, but instead I'll just point you to my full review here.
Want a different style of wireless? Check out these options instead: