I'd have to say the Legacy-Class by Galen & Kaden of SciFi-Meshes.Com, followed-up by the Interceptor-Class
, the Swift-Class
and the Defiant-Class
I prefer small to medium in size vessels, as they're more agile ships that can dip, yaw & bank between larger (Keldon-Class, et al.) enemy ships in close-quarters running fire fights. Ships with more options such as "CONDITION: BLUE"
(vertical take-off & landing), thicker armor to take more hits before it core-breaches, and Quantum Slipstream.