Prof Camcorder On Board What Is The Best ProHD Camcorder On The Market?

What is the best ProHD camcorder on the market? - prof camcorder on board

Looking to buy a high-definition video camera, and I heard the guns are the best. However, I have a Mac and GY-HM100U very compatible with Final Cut (which I use)
So what is the best:

Canon XH-A1:
http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&fcategoryid=175&modelid=14061 # ModelDetailAct

or

JVC GY-HM100U:
http://pro.jvc.com/prof/attributes/features.jsp?model_id=MDL101845


Or ...

None of these elements?

Are there other cameras that are really good and worth the cost? (I look at the expenditures under $ 4,500)

Thanks in advance!