If you want full freedom of movement, you should opt for a wireless mouse such as this one. The side buttons help you use the mouse a bit more efficiently.
From OnBuy
Logitech G G705 Wireless Gaming Mouse, Customisable LIGHTSYNC RGB Lighting, LIGHTSPEED Wireless, Bluetooth Connectivity, Lightweight, PC/Mac/Laptop -
This product is also available at 1 unverified store.