For help in judging the varying merits of individual titles, particularly during the Nominative Reports era, see John William Wallace's The Reporters: Arranged and Characterized with Incidental Remarks (1882):
Year Books: Search Tarlton's catalog for individual holdings or use Seipp's Abridgement (see below).
Nominate/Nominative Reports: For help finding individual titles, see Reference Aids listed on main page or consult with the Rare Books Librarian. Some of the most noted include:
Abridgements/Abridgments: Digests of cases (the precursor to West's Digest System with topic and keynumbers).