Base your opinion on the best scientific evidence available and be prepared to modify when new information arrises. That is science. The Modern Synthesis of Evolution corrects many of Darwin's misconceptions. Moreover, what Darwin believed in the 19th century is irrelevant to modern science. What he achieved, and the advancements he made are highly relevanat.
Science is the process of gathering, interpreting, and testing information.
Darwin made breathtaking steps in the right direction, but he certainly was not able to complete the journey. No, understanding evolution is a dynamic and ongoing process. Darwin formed many of his beliefs on a Victorian sensibility. These beliefs often clashed with his empirical observations and caused him great consternation. His beliefs, though historically fascinating, should have no bearing on what you believe today.