I have just purchased two pairs of the Helly Hansen "Chelsea" trousers. They are amazing and so well made. After a couple of years my Caterpillar trade trousers started having thread come out of the seams. Only disadvantage with the HH trousers is you have to use their own slim knee pads, but I do find my redbacks quite bulky at times anyway
The wife stocks them , worst pants I have ever worn , knees wore in about a month, knee pad holders inside the leg, you have to take them off to put pads back in if they ever come out, crap pants