Best amp for Vandersteen Quattro?

Hope someone can help - I have a Mark Levinson 380s pre with an old pair of Electrocompaniet AW180 monoblocks currently powering my Vandersteen 2 sigs. I have bought Quattros and I am expanding my system for HT use and would thus need amplification for three more channels - I plan to move the EC's to rear channels and need to buy an amp for the main speakers - what do I buy to power the quattros? As I understand it (with the built in subwoofers of the Quattros) I do not need ultimate bass grunt but need an amp with a sweet and open mid and treble - am I correct? My budget is $5000.
Thanks