What amplifier to get for Vandy 1 C's

Hi all,
This is my first post. Anyways, I think I am interested in upgrading my system's amplifier.
Listed components in my system are
Sota Saphire turntable> Cambridge audio 551P > NAD c325BEE>
Vandersteen 1C

I also use a playstation 3 or oppo DV 980-H to play cd's and a sansui sc-1110 for cassettes.

I think I want to break out the amplifier section of NAD and use a separate stage running out of the C325BEE preamp.

Suggestions?