I went through about six different Google Reader clients on the iPhone before I discovered Reeder. It was love at first site. The interface is understated, the synchronization is fast, and it includes tools to e-mail, Instapaper, ReadLater, and just about any other service you could ever want from an RSS Feed.
Good news. Reeder is now on the iPad. I’ve been running the beta as my only RSS App on the iPad for several weeks. It is rock solid and just as beaultiful as the iPhone version. A perfect match for Instapaper.