To Clarify, I was thinking of changing the pickups and pots in my Sheraton. That is when we discussed which way to go.
I ended up not doing it after all. But I did have my pickups changed on a Gibson LP Gold top. I had Burstbuckers installed, and I supplied the Pickups, and a RS guitar works kit that includes the pots, caps, and wires to do the job. That kit is 85 bucks alone.
I have also had the toggle switch changed in two of my Sheratons.
The pickup and pot switch was 75 dollars for my Les Paul, and I am pretty sure it was 50 bucks for each switch including the switch for the Sheratons.
The reason I didn't change all the innards in the Sheraton was that I think the whole thing was going to run me around 350 including the pickups, pots switch and wiring, plus installation in the 100 dollar range. On a 599 guitar it was not worth it.
I think that for a 399 guitar you will spend about the same as the guitar is worth when the day is done. Keep the guitar as is and save for an ES335. That is what I did.