Try Power Usenet (
www.powerusenet.com), they use Giganews servers and you get 50 days retention with 4 connections for $14.95 unlimited.
Trace to here to see your route: news.powerusenet.com
Auto routes to their Euro server for me.
(I haven't used them, but have heard very good things and as they use Giganews servers they should be fantastic for such a low price)