Upgrade CD player or wait

I'm back in the audiophile hobby again. Should I upgrade my CD player - currently a 10 year old NAD - to a Theta Miles or Rega Planet 2000 or should I wait till SACD/DVD-A becomes the standard.

Along those same lines,is it better to get a Theta Miles(came out in 1997) or a Rega Planet or other made in 2000-02. Is the Miles outdated?

Jack