For Slide/Transparency:
Velvia 50, 100, 100f (in descending order of saturation)
Kodak Ektachrome E-100VS or Kodak Elite Chrome 100 Extra Colour
For Print:
Kodak Ektar or Kodak Portra 160VC or Portra 400VC (going out in favour of new Portra 400 which has a balance of saturation between the NC and VC versions, but can easily be boosted during scanning