I'm with Scott here. Even if you exclude the foreign sold models, incremental revisions (ROM revs., etc.), and minor badging changes (ED, FDHD, etc.), at a minimum you still need to add the 512Ke. While I understand the space issue, to have a truly complete North American collection, you need the 512Ke (for the internal improvements) and to a lesser extent the beige AND 2nd gen. Platinum Mac Plus, which have different physical badging too. Good historical pairings with these three Macs are respectively, the HD 20, and HD SC (beige and Platinum if possible) - the good news is they don't take up any more floor space! You should also have a "Macintosh 128K" which not only has different physical badging, but also has a unique logic board configuration.

An arguable requirement is the Macintosh XL, which meets all the requirements of a Compact Mac, except footprint. But considering what it actually is, along with its relative rarity and high cost, I think most on here would give you a pass if you never get around to adding it to your collection.

But otherwise congrats, even this collection is a notable accomplishment, representing the major Compact benchmarks, especially since they all have something intangible that improves their worth, at least to you.