Over the last months I've been using Vienna and NewNewsWire Lite.
NetNewsWire Lite has a nicer interface, with a customizable toolbar, and is a little faster.
Vienna, although not so so fast and not so "beautiful", does just the same. And it does something more: it has a built-in browser. You can read the full news without opening an external browser. To have that in NetNewsWire, you have to pay 30 dollars for the full featured version.
Although I prefer the look and speed of NetNewsWire Lite, I use Vienna more often because the built-in browser is a plus.
And let's not forget that Vienna is completely free!
(But that's just my opinion. Everybody else has the right to think any other way.)