Velvet Underground & Nico (the banana album) is an essential part of any self-respecting rock collection - IMO, natch.
Songs for Drella - ditto.
Loaded & The Velvet Underground are good & contain such classics as Pale Blue Eyes, Sweet Jane, etc. If you like noise, check out White Light, White Heat, esp Sister Ray.
Transformer is OK, but is pop frippery compared to The Velvets or even Berlin (feel the depth of Lou's angst) or New York - both good purchases.
John Cale = JJ Cale??????? Puh-lease! Wake up at the back there!
And for the masochists out there (or Testy), how about Metal Machine Music - a contract filler to piss off his record company.
Boxer