Need a mouse with extra buttons

[Cool Buddy]

I have been using Logitech PS/2 mouse with side tilting wheel. The side tilt acts as 2 extra buttons the function of which can be customised. However, the mouse started malfunctioning a couple of months back. I gave it for RMA as it is under warranty. But after I had to visit Rashi peripherals 5 times to get it back, they said there was no problem with the mouse.

So now I need a new mouse and I want the extra buttons on the mouse. But after such an experience, I'm completely avoiding Logitech, but I don't know which company produces such good accurate mice and in which models I can find such customisable buttons. Please advice. Budget 500-600.

Any opinions about this one from Gigabyte?