Japanese G4M1, I've flown it for about four days now and I have to really recommend it. It doesn't have that great a payload as higher tier bombers but damn, it's sturdy. The rear 20mm blows everything stupid enough to get close to shreds, to the point where a plane can come out at you from no where and just be automatically shot down by the time you switch to rear gunner. And even if that gun runs out of ammo you've still got four 7.7mm guns. Your enemies will run out of ammo just trying to shoot you down, it can take such a hit that they may even give up the chase. If they try to ram you, you've still got a good chance of surviving. It can come with four 250kg bombs, which is just enough to take out 10 ground targets before you need to rearm at an airfield. But I've only flow it in HB though, it might not do so well in Arcade.