Ok, so I have a number of albums by the duo that invented be-bop, but I'm somewhat confused as to what else I should get, and how to best expand my collection without having too much overlap/redundancy I have

Groovin High
An Electrifying Evening with the dizzie gillespie quintet
Now's The Time
Night In Tunisia
Bird And Diz

The question is where do I go from here? Furthermore, Now's The Time and Night in Tunisia have far from optimal audio quality which leads me to believe they aren't the best available versions of these records (and overall I can tell there are several different versions of the same songs)