I would pick certain Deccas where the trumpet is out front and in full solo dressing - this is where Louis sounds best to contemporary ears - try Eventide, for example. If you have my set look at circa 1938 - can't remember which tune I used, but it's a great solo. Or the big band stuff from 1929-33, incuding Stardust - or listen to his solo, only, on Sweethearts on Parade - sounds like bebop, I kid you not -
in terms of source material, I will say what I have said before as I work on my latest project - there are some astonishingly good LPs made of this material and other things, issued in the 1960s and 1970s, when they still had the original masters and before they started doing bad restoration work. It's such an unmitigated pleasure to listen to some of this stuff, it has a clarity and definition that begs for listening, hiss and crackle and all. For example, the LPs of Morton's Generals sound better than the CD reissue because they obviously had original parts; same with the Billie Holiday Commodores. Even an old 10 inch of Jay McShann had a better sounding Hootie Blues than the CD reissue -