Higher resolution Jazz


I'm starting to get more into Jazz music since watching some documentaries on Jazz on Netflix but it seems like all of the older Jazz recordings are of poor quality; can you guys recommend some artists and albums where the recording is of a higher quality?

Thanks!!
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Among others, I have the Duke Ellington on Columbia Records Box Set with recordings on it from the 20's through 60's I believe.

THe sound quality of some of the older mono tracks in this set in particular astounds me. It made me realize that there is no reason to put a time boundary on the recordings that one listens to these days. The older the recording, teh more the chance of rediscovering some long lost gem that perhaps only our deceased parents would remember.
I am always blown away with anything on the Concord label. Great sonics and great content, especially their live stuff.
"Older Jazz recordings are of poor quality".......?
In the 1950 film "Sunset Blvd." Struggling screenwriter Joe Gillis meets the former silent film star Norma Desmond,"you used to be big". Desmond replies,"I am BIG,it's the PICTURES that got small".
Vintage Jazz recordings just keep getting bigger and bigger,it's just the I pods and DACS that got small.
Sometimes I think older may be better because they didn't have enough technology to mess things up. CD is a good example. Its 16/44 uncompressed. If we had lossy digital compression at the time when CD was developed, Redbook CD would have probably never happened. We would have went directly to MP-3's.