ordered the carhartt pvc bibs and jacket. they seemed the most durable.
Let us know how it works for you. I think the bibs are pretty effective.
I'm still trying to figure out a system of transitioning from out of the rain because all the water on the gear basically soaks your van seat, then if your next job is inside you take off the gear and the seat wants to wet you down. Maybe a hanger system in the back of the van to let the stuff drip dry, course you would have to figure out how to get your stuff off and get into the van in the rain. If you just wad the gear up it can let water get on the inside.
Oh and don't forget about water proof spray, most rain wear is treated with a layer of waterproofing that can breakdown or just not be all that great, there are water proof sprays that can be applied after purchase or when the material starts to absorb water. Just google waterproof spray.