I think for another Signature Series build, a Chinook twin rotor helicopter, a stardard cargo variant C-130 Hercules or my favorite idea, an A/C-130 Gunship. Also for main lines (non Signature Series) an F-22 Raptor, F/A-18 Hornet, U-H1 Iroquois, or an A-10 Warthog. Yet another idea would be Axis-th...