Ars Technica has a detailed review of what they consider to be the best Mac RSS readers. If you don't feel like wading through all 6 pages of the article, you can simply jump ahead to the conclusion to see the ratings and how your favorite RSS reader stacked up. It's no surprise that NetNewsWire came out on top, but I am rather surprised that they didn't include any web-based RSS readers, like Feedster and, my personal favorite, Bloglines.
(Via The Unofficial Apple Weblog (TUAW).)
They probably didn't review any web based readers, because then it wouldn't be a mac rss reader review would it? It would be a web based and mac based rss reader review then. Personally I prefer the combination of Netnewswire and Mars edit for rss and blog publishing anytime over the web based bloglines and blogger.