I don't know about the FGS, because I've never had one, but the FAS is a beast. Got one a couple of days ago and it's now my go-to ship for RES farming, bounty hunting, CZs... it's agile, hits hard and can take a beating very well indeed. I use two medium and two large pulse lasers - not the most exciting loadout, but when the weapon capacitor's depleted, the mediums can continue to fire while it recharges. The armour means that losing shields isn't a worry, and they seem to recover quickly even with only one pip in systems.
Great ship, highly recommended.