19khz pilot tone
it will fit fine in a 16/44.1 package- so CD would be my weapon of choice.
Broadcast FM has usually 40-16khz bandwith and ~60 of headroom max
odd that it all still sounds better than a 128k MP3, huh ?
[EDIT - it is ~60db to keep the signal within FM deviation limits]
DVD-A will accept 16/44.1, 16/48, 16/96
DVD-V wants 48k or 96k sampling rates
CD is overkill for FM radio
24 bit will allow you to record lower and not risk going over, but with 60db to capture, you won't have any problems with 16 bit