I want an RSS Aggregator that will allow me to delete entries and allow me to leave the entries I am not done reading.

This method should be possible in every RSS aggregator, but I can not make this happen in any program! The way RSS aggregators usually work does not organize well for me. I do not want messages to appear, then turn light grey once I have opened them, and then disappear after so many days.

I want them to disappear when I delete them and stay put when I do not delete them.

I will happily pay for an RSS reader with this feature, but where is such a program for the Mac?

I am running 10.6.