Vandersteen Moel 2Ce better than Model 1B used in midsize room

@OP, I agree, your integrated NAD has a enough power, but there is more to it than that. There seems to be a couple of manufacturers who's products seem to work seamlessly with Vandersteen speakers- Ayre, Belles, and Atma-Sphere would my picks.
Also, regarding cabling, Audioquest really seems to bring out the definition Vandy's can offer.
As I have no recent experience with NAD( I did own some of their equipment years ago), I would suggest PM'ing Johnny Rutan (Audioconnection) for his take on this. He super knowledgeable on equipment, as well as set up. 
And, he offers it for free with no strings attached.
Bob

Johnny R speaks €...
@audioconnection get to work here buddy !!!

To honor the OP , the mention of 650 Euro seems relevant to the discussion....

and yes Hejira is a lovely lovely bit of work...

I find Vandy owners are music lovers first...

"I've got a blue motel room
With a blue bed spread
I've got the blues inside and outside my head.
Will you still love me
When I call you up when I'm down?"

my experience with the 1Ci is that they require a humongous room, at least 300 sq./ft. and one can't listen to them any closer than about 10' away, any closer and they become strident due in large part to a lumpy small-room response at their 2.8 kc crossover point. their mellowness only reveals itself in a big room with considerable distance between listener and speaker array. they are fairly sensitive though and tolerant of weak amplification.