Dac Upgrade

HI All

I currently have a Perreaux R200i intergrated amp  / Image revelation floor standers ,using a Sony xa5400 sacd player for my discs and a Sony  Hapz1es playing my digital files.. thinking of upgrasing at some stage but not sure if i Go Marantz Sa10 or Halo May dac..anyone compared them , will the be much of a update to my system? or are there any other good / better dacs out there?

CHeers!