My group has chosen a rather unusual approach. They started with a Cobra Class (a frigate hull with more space might have been even better, however, they chose the Cobra for style and fluff reasons) kitted out with a Cypra Pattern stealth drive ( Battlefleet Koronus ) and an Empyrean Mantle, a combination which makes their ship almost undetectable to enemy sensors when on silent running unless their opponent has a really solid detection rating. Coupled with the Passive Augur Array from Hostile Acquisitions their ship may run full augur sweeps on silent running without giving away their position in turn.
Consecutively, they crammed a prow Plasma Accelerated Torpedo Tube component, a dorsal best craftmanship Jovian Missile Battery and a Munitorium for increased battery damage and more torpedo storage into the ship.
Now, with short-burn torpedoes and the initial speed boost from their tubes their torpedo salvos may hit targets within 19 VU in the same turn they have been fired. With the surprise round and to-hit bonus from attacking from silent running they usually hit with the full salvo, quick load their tubes, slow their ship with retros to stay more or less on the same spot and fire a second salvo on their target. They then close in on the target (usually some critical hit has taken out the enemy's shields) and proceed to pound it with their rocket batteries which are equivalent to a Mars macrocannon broadside with the damage boost from the Munitorium and best craftmanship.
At first, I was really surprised how **** effective this build is if used properly. Oh and the best thing is the name their ship has been given... they havee christened her "Red October".
My current group has a rather powerful ship as well right now, at least using just core book components. But I was wondering what I should throw at them since traditional combat has been rather stayed right now... I think you've given me the answer.