After Gold, you can direct your friend to this excellent recap of the Impulse years. It is from 1992, probably out of print, but I would guess can be easily found. Three full CDs.
I bought this new in 1992 and was pretty much an Atlantic/Prestige/Love Supreme-only Trane fan at the time. This was a wonderful awakening for me and I still pull it out from time to time. Does not hit Japan, Seatle or Ascention, but does have several late-period nuggets, including Offering
http://www.vervemusicgroup.com/product.asp...st&pid=9449