I also have Sky Atlas 2000.0 ver.1 Deluxe and have been wanting to upgrade to ver. 2 Deluxe for its extra stars. Mag 8.5 over 8.0 almost doubles the star count. I think ver. 2 also has labels on bright stars (deluxe). The deluxe is is colour and is quite nice and easy to follow. The field guide (companion book) is also well worth considering as it lists objects by chart number.
Uranometria 2000.0 has 9.75mag stars and a nice scale. It has almost too many DSO's mostly faint galaxies that sometimes clutter the pages but are a good reference for imagers. It also has smaller scale finder charts. It is a very nice Atlas in two volumes with a Field Guide (vol.3) listing each object by chart number.
Millennium Star Atlas has 11mag stars and is in three volumes. The hard cover edition is no longer available and the soft cover version does not always stay flat when open. A very good reference atlas to have in an observatory.
If your telescope is say 8" or under go the Ver 2 Deluxe Sky Atlas. If 10-12" or greater go the Uranometria.
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