FeedDemon is great, I have used it before but sincerely, Pluck seems more..... advanced! And plus its free, wonder what kind of Pluck they'll put out now that they have a $8.5M dollar donation from 2 system companies.
I use Sage. Its an extension for Firefox. http://sage.mozdev.org
Its extrenely fast, simple to use, and even has a minimalistic display for the 'articles'
Oh, and you can theme it a bit with custom css files.