I would agree with you. At least unless propulsion takes a leap forward. This guy claims to have a built a magnetic fusion containment engine when he was 17. He needs to put up or shut up. http://www.youtube.com/watch?v=DEPYOad1cnQ&feature=related
We had a nuclear engine in the 70’s. http://www.daviddarling.info/encyclopedia/N/NERVA.html