Building a 100 album vinyl collection 3 must have albums are?

Scriabin by Sofronitsky...

Josquin Des Prez Missa pange lingua ..

Carlo Gesualdo books of  MaDRIGALS..

Pink Floyd - Dark Side of the Moon

Many others I have seen listed in this thread.

Exile

Workingman’s Dead

Sgt. Pepper

Steely Dan-Aja

Eagles-The Long Run

Linda Ronstadt-Simple Dreams

(Some EXCELLENT choices listed above!)

Kind of a silly question since any pressing will sound different than another. Hence get ready to spend some big bucks searching for the best sound of any record.

Example, someone mentioned Electric ladyland. The newest 2010 edition remastered by Eddie Kramer himself, a supposedly top pressing,  absolutely sucks. Instead the original naked ladies cover that was outlawed in the UK still rules. 

Point is there is no quick road to owning the best sounding vinyl, it's a journey. The reward is researching for the better versions usually pays off if you can afford it.