Im going to be ordering a few pots tomorrow for a neck humbucker and bridge jazz pickup configuration and i have a few questions about the pots im going to use because im a total noob pretend i dont know anything(cause i dont

).
i want to wire the neck and bridge pup into a separate 500k tone from there go in to a balance pot and to a 500k master volume.
first off 500k vs 250k from a functionality standpoint is there a major difference i should be aware of.
Caps??? what are they. would they be necessary in this configuration or not. if so what kind?
heres the
site im going to order them off of.
thanks for the help