I'm scrambling as usual, so no time for a full post. I've been running through Feedbin, Newsblur and Feedly today. I paid for both Feedbin and Newsblur, and Feedly is free.
My biggest disappointment is Feedbin and Reeder.app -- the sync isn't working! Feedbin says I have 270 unread, Reeder.app says 1086. Reset didn't help. Next disappointment -- both Feedbin and Newsblur didn't get my Google Reader custom names for feeds. Only Feedly picked those up.
Newsblur (open source!) is far too social. It insists on showing me comments as I try to read my feeds. It shares to Pinboard in the web app, but not in the iOS app. No Reeder.app support. Newsblur is strict folder hierarchy - no tags, no acyclic graph organization. No URL sharing. Newsblur has best performance and most features, but so far it's not right for me. I'll try again in a month or so.
Feedly has the very irritating plugin model and no Reeder.app support. It's my emergency fall back.
Feedbin has URL type share to pinboard; that's enough for me since I use Pinboard tags to control IFTTT routing to app.net, twitter, and kateva.org/sh. Feedbin's tag model is a much better fit to my GR org than Newsblur's hierarchy. That's really big for me. I'm very glad I can now 'hide' all tagged feeds. Renaming feeds are unsubscribing is very awkward; I'd argue there's a bug with that UI. (Tip: rename feeds you don't want to 'z', then when all done with name repair save, then select all 'z' then remove.)
Ugh, this will be a hard transition. There's still no true heir to GR's basic functions, not even counting all the abandoned features it had.
If not for the Reeder sync problems I'd go with Feedbin, but that's a bad fail. For the next few days I'm happily back to Google Reader (7 days left!), I'll see if Feedbin's sync bug clears itself.