Cirrus - I think 6 x 1000lbs delivered accurately on your head would be a pretty good tickle. And it is tested, or didn't you read the article?
Yep, sure it can make a huge bang, at huge cost, when it is occasionally available, and with a long tail maintaining at a distant airbase. But how often do you *really* need to make a huge bang in current theatres and in all the most likely future theatres? What is need right now is CAS helicopters, based in forward operating bases close to troops on the ground, plus light surveillance and comms relay aircraft with long loiter times.