to date, RSSOwl is still my favourite RSS reader - but given its lack of support I am getting used to the idea that I may have to switch at some time.
It seems (to me) that QuiteRSS has taken some inspiration from RSSOwl (which is a very good thing!) - but the one feature that is very important to me in RSSOwl and is not in QuiteRSS is the Saved Searches. With Saved Searches, the news database is dynamically searchable for keywords, and this is a great tool for cross-referencing all news items.
Any chance this feature will one day be in Quite RSS ...?