Prior to The Great Site Update of Christmas 2014, we published a list of amari hidden under a link on the recommended brands page. We have put some time and thought into our bitter friends, and have split the list into our top dozen or so recommendations, plus a list of other amari that are available.
Some amari are easy to find; others ... not so much. There are hundreds of amari that aren't even imported to the US. Look for amari at larger liquor stores, or specialty stores in the Italian section of your city.