Meet the Assault Frigate. I call this particular craft the Princess Koriana. After trying several ships for exploration I find myself pleased with durability of a T2 Hawk-class Assault Frigate.
In the space of 24 hours this nimble craft has earned enough exploration loot to pay off it's rather expensive 20 million isk pricetag. The most remarkable thing being it's ability to penetrate into low sec space, tank and kill the rats, and still get out of the way should another capsuleer warp in.
It's signature radius being significantly less than a cruiser makes the assault frigate an ideal ship to avoid being scanned down. So far it's working. The only ship better for this job might be the Gallente Ishkur, whose drones would provide additional firepower. The inherent resists of the T2 hull make tanking the guardian rats a breeze!