Funny thing is, the click mechanism in Logitech's mice tends to break in that exact same way, regardless of what mouse I buy. It'll only get worse from there on out, and pretty soon your click will cease to work.
However, their mice are relatively cheap, and take a few years each to break. So I still recommend them
Get a G400. One of the few mice with a "perfect" 1:1 sensor. Razor Naga is another.