wnfaknd,
From what I have seen recently at Ron's saltwater heaven and on a few web sites, I would say yes.
I upgraded to 3x400W MH over my 225 about a year ago (up from 2x175W), and wish I had just added some VHO's.
MH give that nice shimmering effect, and my 400's sure are bright, but all of my SPS look kind of "washed out".
HTH,
Adam