Jazz Club..... Nice....

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”

Hi guys thank you all for your input ,I have ordered some gold lion kt77s and some voskhod 6j1s so hopefully some improvements to the amp. As for the recommendations for music really like John Coltrane and the Charles mingus track goodbye pork pie hat  and chet I think its Baker or Barker sorry can't remember but any how enjoying finding and listening to these fantastic musicians ... 
Cheers Dave

Hi Dave,
I'm glad that you are enjoying the jazz genre,  timeless music performed by supremely gifted musicians.  Frogman made some wonderful recommendations.  Dave, you won't find a more knowledgeable jazz aficianodo on this forum than him.

I hope that the Gold Lion KT 77s work out well for you. They've achieved quite a word of mouth reputation, of course  different ears/amplifiers/audio systems are a factor in regard to preference. 
Charles 

Dave ,
A few names you may or may not have come across. 
Good stereo recordings from the late 1950s-early 60s.

1 Dexter Gordon "Doing All Right" Blue Note.
2 Coleman Hawkins "The Hawk Relaxes"  Prestige.
Some West Coast Jazz flavor,
3 Hampton Hawes "For Real"  Contemporary 
4  Curtis Counce "You Get More Bounce With Curtis Counce" Contemporary. 
They're all either quartet or quintet groups.
Charles 

Here are some to consider that demonstrate the range of great instrumental jazz:

Coltrane "Giant Steps" and "Ballads"
Keith Jarret "The Koln Concerts" (improvisational solo piano) and "The Melody at Night, With You" -- and lots of his classic trio recordings
Oscar Peterson "Night Train"
Arne Domnerus, "Jazz at the Pawnshop"
Bill Evans, "Sunday at the Village Vanguard"
Miles Davis, "'Round Midnight"
Al DiMeola, Paco deLucia, John McGlaughlin, "Friday Night in San Francisco"
Pat Metheny and Charlie Haden, "Under the Missouri Sky"

And so on, and so on, and so on...

Happy listening!