The JVC HD100 only shoots HDV at 24 or 30 fps. It shoots SD at 24, 30 and 60 fps.
If you're going for the 'film' look then just shoot HDV 24p at 1/48.
Unfortunately, as I'm sure you know, there is no set standard for HD.
As far a frame rates go you can take your pick.
24 = film look / 30 = TV / 60 = liquid motion, slow motion (conform), fast.
What kind of work are in?
Whatever the situation the HD100 is a great camera.