Here is a good visual diagram of News Servers I found last year!
I have kept Astraweb as my primary server and have a Tweaknews block as my backup server (Use SabNZBD) and have zero issues whatsoever.
Tweak is slower due to the distance traveled by the packets but necessary for completeness.
If you only download a little a month then a block plan is the way to go. You'll find that many won't openly talk too much about Newsservers as it's been a rough couple months with NZB sites shutting down, DMCA takedowns, and private invites getting slimmer.
I'm not a member of any private sites and have been using Usenet for well over a decade now (remember Agent and 300 day retention on Giganews? anyone?)
If you know what to do just use binsearch or nzbclub to find older stuff!
Thanks for the diagram, i finally dl and saved it.
Been using tweaknews as my main, as all us servers are for the most part useless.
How many connections are you using for tweak? It is slower per thread, but if i bump up to 20 connections or so, i fill my full 25-30mbits i get from my cable provider.