I've always liked Google's Reader, but www.feedafever.com
is pretty great, but this is something you'd install on your own hosting account.
Feedly is good, never really had much of a problem transitioning from Google to Feedly
I like the style of newsblur, but their free account is limited to only a handful of sites.
Out of the bunch, Feedly is probably going to be the replacement for Google Reader for a lot of people.