Its been mentioned before, but I absolutely love my Motoport pants. I have the Mesh kevlar material. I tried out the Firstgear offerings and neither would slip over a riding boot. I felt the whole point of having an overpant was that taking off your boots would not be necessary. The motoport ones are 20 seconds on or off. My brother and a friend bought a pair for themselves as soon as they saw mine.
Finally, they are custom tailored to your size, and they are made in the US. The quality is impeccable.