For anyone that's new to newsgroups or just looking for a good app to manage NZBs, I'd take a hard look at Altbinz first.
I've been using Newsleecher for almost 2 years and like it, but wasn't thrilled about being charged for supersearch and upgrading every year. I understand the pricing and support model, but it leaves some feeling left out in the cold a bit.
I prefer the pay once, upgrade forever method w Forum help support as well as developer chime ins on occasion.
Anyway, Altbinz, to me looks even better and FREE! ... After I run it through the mill for a few weeks, I'll donate a few bucks.
The search features alone clinch it for me ... all the other features I want are there ... Auto Unrar etc ...