Speaking of Henry Grimes, check out "Sonny Meets Hawk!" Grimes on bass, Sonny Rollins and Coleman Hawkins playing sax. Sonny playing pretty darn free and Hawk keeping up admirably. Priceless.
And my pick for most underrated Sonny Rollins CD as Sonny week builds toward his concert in Chicago Friday night (I am so excited): "Nucleus." Mr. Rollins gets funky.