I've used the Uranometria 2000.0 for year; happy with it. Until recently: I 'discovered' the IDSA. Main differences: the Uranometria shows many many very faint galaxies (ideal for mij 30" telescope), and the IDSA shows much more large/faint (dark) nebula (ideal for my 13" at La Palma).

Last month at La Palma was the first time I really used the IDSA in a very dark area. There were a lot of new objects to dicsover I never know before: LDNs, Sh2's (many of with are not shown in the Uranometria).

But ...

During the seven full nights observing at La Palma, I've seen many more bright (not so bright!) and dark nebula, that are not shown in the IDSA. And now the problems starts: how to identify these nebula? I also do use SkySafari, but in most cases, it only shows squares at the approx. location of those nebula. So far, I was not able to find an atlas that shows more LDN/LBN nebula (and even ICs) than the IDSA. What is the next step? Who knows a better atlas for these objects?