What a great collection! Novel last lines are likely harder to make memorable than those for short stories, which frequently depend on their final lines for impact--as with "Nine Billion Names of God." I was glad to see Zelazny on this list, because I think he is a master of the compelling final image.
As in "Rose for Ecclesiastes": "But when I awakened I was in the dispensary, and alive. I felt the throb of engines as I slowly stood up and somehow made it to the port. Blurred Mars hung like a swollen belly above me, until it dissolved, brimmed over, and streamed down my face."
And in "This Moment of the Storm": "It is cold and quiet outside and the horizon is infinity. There is no sense of movement. There is no moon, and the stars are very bright, like broken diamonds, all."