Nexus. It's controlled by your wishes--Unimatrix Zero, to the best of my knowledge, was just a park--a nice park, but still...I prefer the variety.
Would you rather go the holodeck with Barclay or Bashir as your guide?
"The saying implies but does not name the effective agency of its supposed utopia.... 'Needs and abilities' are, of course, subjective. So the operative statement may be reduced to 'the State shall take, the State shall give'."