It's Vagabond, what can I say that hasn't been said? If you're coming off of Berserk, inspired but a bit depressed from its complete lack of closure, strap in and double down with Inoue's masterpiece.

This has a similar hope for completion, but a similar chance that we won't see it. Regardless, witnessing Musashi's odyssey of personal growth and conciliation of his purpose is quite the experience. Although the content could be interpreted as a bit repetitive (sword fights, "why am I here/what is strength", etc), the true core lies in that reflection. 

And I haven't even gotten started on the art...