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I loved the Treasury of the True Dharma Eye: Zen Master Dogenβs Shobogenzo edited by Kazuaki Tanahashi.
Tanahashi also edited a compilation of some of the fascicles of the Shobogenzo, grouped by way of themes. I found it most useful as well. The Essential Dogen: Writings of the Great Zen Master.
Upvote:2
I like the translation I have at home, by Chodo Cross under guidance of Gudo Nishijima.
What makes this translation unique, it's goal was to stay as literal or as close to Japanese original as possible. So unlike other translations which are often overly idiomatic and make their interpretations for you, this one leaves it all as written by Dogen. Beside leaving interpretation of subtleties up to the reader, it also preserves the flavor of Dogen's speech - which makes for a more tasteful reading experience.