I'm going to have to go with the AC130 for a couple of reasons:
First off, my harrier strike destroyed a chopper gunner before. It said I had taken out the gunship when I wasn't doing anything. Unbenounced to me, my hovering harrier shot down the gunship. Chopper gunners are too vulnerable. Nine times out of ten I see the chopper gunship get destroyed before it even gets to the map. Even predator missiles can take out chopper gunners. Yes the chopper gunner has one set of flares, but they will not protect it from a predator missile. Kinda pathetic on how easy it is to bring down a chopper gunner. They are too easy to bring down. AC-130s on the other hand are much harder to take down. Nothing can destroy them except missiles. AC-130s can also take down enemy air support (including chopper gunners). AC-130s are hands down the best for multi-kills also. For these reasons, I use the AC-130. And its a lot more fun!
First off, my harrier strike destroyed a chopper gunner before. It said I had taken out the gunship when I wasn't doing anything. Unbenounced to me, my hovering harrier shot down the gunship. Chopper gunners are too vulnerable. Nine times out of ten I see the chopper gunship get destroyed before it even gets to the map. Even predator missiles can take out chopper gunners. Yes the chopper gunner has one set of flares, but they will not protect it from a predator missile. Kinda pathetic on how easy it is to bring down a chopper gunner. They are too easy to bring down. AC-130s on the other hand are much harder to take down. Nothing can destroy them except missiles. AC-130s can also take down enemy air support (including chopper gunners). AC-130s are hands down the best for multi-kills also. For these reasons, I use the AC-130. And its a lot more fun!