I tried Dynamo 5's first volume, but it just did not work for me. But Copperhead is one of my favorites ever. I think it's better than the so much hyped Saga.
We look at D5 differently but I get the Saga reference. I tried it and can see the appeal but it's just too far away from my comfort zone, I guess. Copperhead on the other hand has that whole Western vibe running with the sci-fi, and the characters may be more simple and straight forward in their own way but are compelling beyond their outer appearances.