I use some knock off called a RedDragon M702 PHOENIX 4000, which is wired, 1000hz polling, and 4000dpi. Adjustable weights.
I can't really can't fault it. Along with my g-sync Acer XB270HU gaming monitor, the cursor glides across the screen so silky smooth, that its like butter melting in your mouth.
It feels like Im back in the old days of CRT with a mouse gliding across the screen that smoothly. (even tho gsync and 144hz is the tech making this happen. The 1000hz also helps) Anyway, i think it cost like 20bucks.