not really. there's only so much you can do with a 150ton weapon. +50 tons for engine, that leaves you only 50 tons for armor, command module, fuel, and fire control. You either have to accept lower than hoped-for speed, or use meson FACs instead.
in general: gauss cannons make the best point defense fighters, but inaccuracy with small GCs is a problem. Reduced size lasers pack the best punch, but turreting them is prohibitive. Missiles are the most flexible in terms of fighter size and role, but require a greater logistical effort. (Missile fighters are far superior in many ways, but they do have some disadvantages.)
once 5.7 hits, there will be more flexibility in fighter design in the sense that larger fighter will be more viable. However, beam fighters will also lose their primary advantage compared to larger beam ships -fighter engines won't be as automagically superior.