This completely depends on the player, really. But as a general rule you'll be best with what you learn to fly in. In terms of raw stats the Eagle and Wraith are the best ships currently in the game, but neither are particularly easy to use correctly.
Stop looking at the tech and start looking at yourself is my advice to anyone having issues in combat. Skill always takes priority, and once you reach a certain level you'll realize the tech you use mostly just depends on aesthetic preference.
