Which camera should you choose? The best one you can afford, of course.
There is more to the camera choice than meets the eye. The main consideration is actually not the budget but the HD standard that you are required to shoot in. Selecting the standard will limit the number of available cameras.
Then there’s price too. There are Ferraris and Honda Civics. The most expensive is not always the best. If you’re just driving to the grocery store and back, a Civic may be a better choice than a Ferrari.
It’s not possible to recommend one camera over another without knowing the specifics of your production. Luckily there are far fewer HD cameras available for rent or purchase than there are SD cameras.