I suggest
B17: The Mighty Eighth
http://www.strategyinformer.com/pc/b...th/review.html
It's quite a unique experience and you'll be very satisfied once you complete your first sucessful bombing run since it takes some pratice to figure out the controls for the bombadier. Don't be surprised if you develop some attachement to your crews either, it's great to see a guy survive three bombing runs or barely making it home alive only to fly another day after he gets cleared from the doc.
And if memory serves me well you can hop into an escort fighter or even the Germans and test your luck up against a formation of B-17's. And with the proper tools which can be found on some fansites you can create your own nose art and paint your plane as well.
You can try the game free for 30 min from here:
http://trygames.com/game/aff=trygame...177a32f609d79d