A DSLR might have better image quality, but a GoPro will be cheaper, easier, and probably will look better in the end. If you want to shoot someone through a windshield, rent a GoPro. Or shoot from the back of a pickup looking at the car, with a zoom or prime lens. Or use google and type in "DSLR car mount". Or instead of relying on the internet, go test and try out things yourself. Or hire an aerial videographer that knows what they're talking about, and can explain to you - why [insert ridiculous question here]. Try out the balloon thing, do google searches, but more importantly - make something.
I'm not sure why I'm even responding. You usually ignore everyone's advice, and/or give up on that cool shot you want, and start another thread for color grading, lighting, or how to achieve [something ridiculous that you are not going to achieve because you do not have the budget and/or experience].
Maybe you should pull out a camera, get some actors, and shoot something - regardless of how terrible it is. But then again your reputation will be wrecked and you'll never work in the film industry ever, right?
Write a script.
Get your gear.
Get a friend.
Shoot.
Edit.
Post.
DONE!
I have a headache. Why did I even bother. I give up.