Wood shafts are measured to the back or the point, so yes, you need to add an inch or more to that length for your cut, in your case 29 1/2". I prefer a long taper and add 1 1/8". You can always cut it shorter.
Any of the saws you mention will work just fine. If you can set it up with a fence that will help. With the chop or radial, I would bundle the shafts together and cut them all at once. Splintering isn't reall an issue as you are going to remove it with the taper. Point taper is 5 deg, BTW.