I've been listening to the Duke Ellington/ Ray Brown album, This One's For Blanton, and really love Ray's tone, and feel. Definitely inspiring me to get my Strunal set up, and get going on learning to play the darn thing properly..... Some others that I've been enjoying are the Bill Evans/ Eddie Gomez albums (some withE. Gomez on electric), the Charlie Haden duet albums from the 70s (with Ornette Coleman, Alice Coltrane, etc), and the Hank Jones/ Charlie Haden album of Spirituals. What are some other duet albums should I be aware of?