As with browsers, I keep moving between RSS readers (NetNewsWire, NewsFire, Vienna) ... but keep coming back to Shrook because of four reasons:
1. It has the most subtle and effective method of showing which feeds have updated most recently;
2. Although it demands a wide screen, because of the physical size of the single window, a lot is packed in without becoming unreadable, and the method of switching between feed listings, feed details and Web pages without using tabs is slick;
3. The new "highlight item changes" feature is better than NetNewsWire's;
4. It consistently has the fewest problems with parsing malformed feeds, of which there are unfortunately too many.