I use Forte Agent for when I actually download headers for newsgroups. Agent has a nice clean interface for organizing all the headers and making it easy to read and download.
I switch to Newsbin for Internet searches and downloads as it's just a simple one step process. Yes, I know Sabnzbd is free but I did not know about it when I bought lifetime for Newsbin.
I used Usenet for a year and didn't like it because it has painfully slow log in. Very annoying when you're browsing headers and want to see an image before deciding if you want to mark the headers for download. Before Usenet I used Forte's Premium News. It's my favorite but way too expensive at $15/m and with short retention. Log in is instant. Now I use Astraweb which has the same fast log in with same retention as all the other major servers now.