You may not agree with the Top 10 choices, but, with another perspective, the list (with reviews) may provide impetus to buy if you are missing any of the albums mentioned.
In reverse order, PopMatters Best Bluegrass for 2013 is as follows ….
10 Alan Jackson The Bluegrass Album
9 The Boxcars It’s Just a Road
8 Steep Canyon Rangers Tell the Ones I Love
7 The Steeldrivers Hammer Down
6 Dailey & Vincent Brothers of the Highway
5 Claire Lynch Dear Sister
4 Del McCoury Band Streets of Baltimore
3 Della Mae This World Oft Can Be
2 Gibson Brothers They Called It Music
1 Frank Solivan & Dirty Kitchen On the Edge
The full article can be found on the PopMatters’ website.