"Waterproof" is one of those words that scares manufacturers. No, they aren't waterproof. BUT, they come with weatherstripping, and if you apply that correctly, you will get a decent seal. Should be good for keeping out most road spray, and lots of the wind.
These are safari-style tube doors, so they won't ever be as sealed as a factory half door. They will be at LEAST as good as our fabric lower doors that we've been making for years and years.
Johnny: The black powder coat would look OK as far as I'm concerned, but it might be a bit flat for you. Especially on a shiny black Jeep, where the contrast stands out. I don't have pricing, since that's up to our retailers.