Just a stupid thought, but maybe they are just kinda expensive... and to be honest, there are probably more bang for your buck alternatives out there....
Don't get me wrong, they are great products.... But I for one, would rather go with something like Emotiva if I was looking for a new amp...
I currently have Rotel, which is just fine, and I have always marveled at the N.A.D. products, but didn't want to dent my wallet with as many other products are out there...