I'd say the Daedalus from Stargate. Not because it is more powerful than the Prometheus, but that it just looks cooler, and Caldwell is a great Captain (or should I say Colonel).
<img height=300>http://www.sg-operations.com/Images/Daedalus_800x459.jpg
Also once it's fitted out with the latest Asgard tech after SG-1 it is almost unstoppable.
<img height=300>http://www.sg-operations.com/Images/Daedalus_800x459.jpg
Also once it's fitted out with the latest Asgard tech after SG-1 it is almost unstoppable.