Yes, they are very good sounding tubes. How I wish I had bought an extra set a few years ago when I replaced the output tubes in my Manley monoblocs! It’s that time again and sixteen matched 6L6GC’s are impossible to find. Singles, when one can find them go for about $100 each!
Very good Jazz recommendations, Charles.
To the OP: Probably no better record as an introduction to this great music. Besides simply being a great listen, the importance of KOB in the overall scheme of Jazz cannot be overstated. Like much of what Miles Davis did, one of those recordings that literally changed the direction of Jazz. The most important early use of a modal approach to harmony; and things would not be the same thereafter.
A couple more records to add to the great recommendations already offered:
Oliver Nelson/ “The Blues and the Abstract Truth”.
Charlie Parker/ “...with Strings”
Herbie Hancock/ “Maiden Voyage”
Charles Mingus/ “Ah Um”
John Coltrane/ “Blue Train”
Art Pepper/ “Meets the Rhythm Section”
Miles Davis/ “Seven Steps to Heaven”
Duke Ellington/ “...at Newport”