I'm a weirdo that doesn't even keep an album. Some notable ones are kept in dealer stock cards, but the rest are all in glassines where I can easily pull them out for study.
Having said that, I like all of them and would buy all three if I could afford them. If I was forced to choose, then I would pick #1 because it has some clues to its postal history.
All three were scanned within 14 minutes of each other on the same scanner. The scans aren't the best at depicting them in the real world and they are about half the maximum file size limit here.
Image EXIF metadata can tell you a lot.
http://www.irfanview.com/ and its plugins are what I use for processing many of my images posted here and for viewing metadata.