Why the need to go wireless? I don't see that mouse lasting too long without charging. It uses a superb sensor, but a power hungry sensor.
The cheapest mouse to sit in your hand happens to be the MasterMouse.
I will recommend the G403 wired. It is priced around $40 today in the US. The G403 wireless is replaced with the G703 which is a great mouse but expensive. Alternatively there is the same shaped G603, but due it having AA batteries it is on the heavier side, but easier on the wallet.
I know the Xiaomi is on special, but it is in the same price bracket as the G305 which is simply better in every way, but it isn't shaped to sit in your hand.
All this comes down to how you grip your mouse in any case.
There are many other mice on the market, Cougar also upped their game and is very well priced.
Wires which are restrictive, get a bungee. The Cougar bungee is cheap and locally available and much better than the original Razer bungee or hack your own with a paper clip.