From the responses and the search I have done with the McCormack/Vandersteen combo, I think I'll try the DNA 0.5.
In addition and in reply to Pragmatist, it's not that the Rotel doesn't sound ok with the Vandersteens, but I'm sure for not much money, a good 2 channel amp is going to be better than the bridged Rotel I'm using now.
My main system is Naim Audio so I know there's always something better out there for upgrading. The sale of the Vandersteen center channel and the Rotel 6 channel amp makes the upgrade fairly painless. :)