Body Die or Full Length Die for Shoulder Bump?

Thanks

Redding S FL die - $41.20. Redding S neck die set - $75.75. Redding S bushing neck die - $41.20. Redding body die - $20.70. Lee Collet Neck Size Die Set - $34.98. What to do? Is the dead length bullet seating die that comes with the neck sizer a good thing? If it is mabe thats the way to go with the redding body die?