I love my Klim jacket and pants, but their boots are heavy, first few years were leaker's, and they don't seem to last long (like their gloves).
I never noticed that the boots were heavy. Mine have also been very durable. I've had two pair in the last six seasons and I typically ride 30+ days a winter. My soles did tear up on my first pair but I had the crappy Dragon running boards that tore up boots. Now that everyone has decent running boards, I don't have that problem anymore.
I haven't tried all the other boots and that's because my Klim boots have been perfect. I'm a guy that has to have comfortable shoes. I can't buy cheap shoes. The Klim Adrenaline boots keep me dry, comfortable and warm. Perfect!