I have 59 I haven't owned from the top 100 and 58 I haven't owned from #101-200. I will have to waste more time to look at the list and see if my sampling from other tiers is equal.
My three first misses are "A nation of millions" (18), Led Zep IV (28) and "Thriller" (33).
I've played other people's copies of LZ IV to pieces, though - and come to think of it, my girlfriend possesses a vinyl copy of Thriller, so it's in the household.
I guess should hurry out and fill that embarassing Public enemy gap.
Concerning Patti Smith, Horses: I guess it's a female case of the Bob Dylan syndrome. She admittedly is not very varied, but once that voice gets to you ...