Imperial navy pvper here, I have quite a bit more experience flying the ieagle in combat than most pilots I imagine. If I would recommend any loadout based purely on thematics and fun, it would be 2 enforcer cannons with a packhound missile launcher.
That said, as many others here have mentioned, aside from looking cool, the courier does every single thing better than an ieagle. These ships are built for speed, leaving all talk of modules and loadouts aside, the most important thing it comes down to, is you're balancing for size 3 enhanced thrusters, and the courier is 15 tons lighter on its base weight. I can build a combat courier with 1k armor, 600 biweaves, and an 851m/s boost. But the ieagle is so heavy, to do any kind of respectable combat build you have to sacrifice a lot of speed.
