I would not pay $30 for this. Actually it does everything I want it to already - I would probably donate if there was the option but I don't want to get into some absurd Newsleecher-style licensing. Otherwise I'll stick with the current free version.
Can you set some servers to read headers only and the rest just to download? I am using Newsbin Pro right now, I have setted two servers to read headers only, the rest to download and no reading headers.