Best Unknown Jazz Album


Yeah, everyone raves about Mile Davis' "Kinda Blue" and Coltrane's "Blue Train". But what is the best unknown jazz album in your collection?
jcidulka
If anyone decides to look for that Grusin/Sheffield LP, be advised that around 1990 there was a copy made of this album. It was made from a copy of the master and not quite like the original sonically. Still pretty good sounding and nice to listen to. The original is a collectors item, so make sure the person selling it has the Sheffield original. I bought mine new in 1978 or about.
Intermodulation was the other Evans/Hall duo disk. They also worked together on Interplay as a quintwet with Philly Joe, Freedie Hubbard, and Percy Heath.
Anyone heard or listened to Julian Priester? I can't find the damn thing and can't remember the title -- I DO remember it is interesting. Talking about jazz obscurities, I picked up a Czech (Supraphon) LP by J. Stivin & Co Jazz System, "Five Hits in a Row". Dating back from 1973, it's a great piece!