So I put turreted cannons on to break hulls and apart from the limited ammo they're very effective. It's a shame I can't seem to find anything better than gimballed beam lasers though to take down shields. The beams are good but there must be something better, I just can't seem to find it.
Well, do you have your beams on the small or medium hardpoints?
If they're on the class 1 hardpoints, put them on the class 2. That would be an upgrade. Additionally, you should swap gimballed weapons for fixed - the fixed weapons do more damage; I'm given to understand that it's about 25% more.
The only other improvements would be railguns or plasma accelerators, but you're then looking at major power management issues.
Personally, I prefer 2 fixed class 1 beam lasers and 2 gimballed class 2 multicannon. My ship loadouts are in my sig.