The Plasma Missile has a lot of charge.
The Alloy Burner Missile entry had a few errors but has been since corrected for v1.04. Same goes for the Quantum Torpedo, which shouldn't be a directed torpedo as you mentioned.
The Gamma Pulse Torpedo has a generally better damage ratio and enhanced PD evasion (speed, defense bonus) than the Quantum Torpedo - but for the RP investment it would probably be better if it was 40kT.