My favourite KDF ship to date is the Hegh'ta heavy bird of prey. Not only is it free, it kicks major butt and is the only (redneck engineered) science vessel with DHCs out there.
This bird of prey is also really angry and loves crapping on its archenemy the Fed Pigs. Despite complaints to the local authorities, cruisers are routinely found with thousands of bird craps on them every morning.
Thus named IKS Iratus Avis (latin for angry bird), my angry bird of prey is a rather capable warship as it is annoying crapping all over the Fed'Pigs' cruisers.