Ablang,
On further reflection - while your review is really well written, I find myself completely disagreeing with your description of the Dynaudios - this is not how they sounded to me on an extended listen with high end ARC tube gear, which might lean a bit to the warm side, and all kinds of source material. I got no sense of congestion in the mids. I found the 140s to be completely neutral and wonderfully musical on all kinds of recordings. I came away thinking "what a wonderful HiFi bargain - nice box, nice sound".
Which makes me wonder - are you sure your speakers were completely broken in? Even if you purchased them used? In Wes Phillips' Stereophile review he goes on about how there was a night and day difference between the speakers sound early in life compared to after many hours of intense breaking-in. Phillips' description of the sound before break-in is closer to yours than his description and my experience after more complete break-in. Here's the link:
http://stereophile.com/standloudspeakers/506dynaudio/
Excerpt below:
"I placed the Focus 140s on 26"-high, aggregate-filled stands and faced 'em straight ahead with no, or extremely minimal, toe-in. This placed their tweeters at ear height for me. Then I waited. And suffered.
How come? Dynaudio had told me up front that the 140 requires lots of break-in. Unlike with many loudspeakers, however, breaking in the 140 for a long time did not result in a small difference between good sound and better. It was more like the difference between god-awful and astonishingly good. Out of the box, I found the 140 veiled, murky, and pretty hard to listen to. After about 100 hours of playing music, they might have actually sounded worse—fortunately, when it comes to pain, humans have short memories. But after the 140s had played 250 hours' worth of full-range, dynamically challenging music, I walked into the house after a day spent elsewhere and listened in amazement. I heard music—and I saw that it was good.
Considering how good the 140s sounded once I'd broken them in, I'm almost tempted to minimize how unimpressed I was by them at first. Almost. The problem is, given the scant hours of play any given demo speaker receives in a hi-fi shop, you may never hear a properly broken-in pair until you've taken them home and endured that long, heart-stopping trial by fire. If you buy a pair, hang in there. There's one heck of a payoff. Eventually.
Although the Focus 140s come with foam port inserts, I didn't use them, preferring their tonal balance unplugged; however, the inserts may come in handy in some rooms. To my ears, the 140s sounded best well away from the walls. Moving them closer to the room boundaries did reinforce the midbass, but in that area they required little boost."
With all that said and posted, the Vandersteens are great speakers, and I think you will be very happy driving them with the big NAD amp. Happy listening :-)
