Steelseries Rival 100
We've already tested the Rival 300 and Rival 700 from Steelseries before, however this series also features an affordable model. The Rival 100 features a nearly symmetrical design with a limited amount of buttons. Since the back/forward buttons are only placed on one side, the Rival 100 is only suitable for right-handed people. It costs about 25 to 35 pounds.
The software from Steelseries is great, as we used to. The logo on the palm even features customizable RGB lighting. However, you can only save a single profile on the mouse itself, which means you'll always have to switch using the software.
Unfortunately Steelseries used a sensor that does not perform that well: the PixArt SDNS-3059-SS is quite old and in terms of lift-off distance, speed and acceleration it's really no good anymore.