The best replacement for reeder is flipboard.

The best alternatives to reeder are rated as following:
★★★★★  flipboard
★★★★  feedly
★★★★  netnewswire
★★★★  feeddler
★★★  mr reader
★★★  pulse
★★★  unread
★★★  caffeinated
★★  mobilerss
★★  newsrack
★★  instapaper
★★  readkit
★★  byline
★  pulp
  reeder
  google reader
  early edition
  readability

Your alternative for reeder is not listed? Suggest!
Speaking about reeder, one probably shouldn't forget about feedly.

Other search terms related to reeder and their ratings are:
★★★★★ feedly
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Google Trends

Scale is based on the average worldwide traffic of reeder in all years. Click on graph for more.
reeder
flipboard
feedly