Knifeblade pant discussion here.
I ordered the Knifeblade's and wasn't impressed with the size and cut. Way to baggy on the men's medium. The Power Shield Pro appears top-notch, but I don't think the seams are taped, making them not waterproof. In soaking, pouring rain, I wouldn't trust them to keep water out. Plus, they would take a lot longer to dry than the Precip pants would.