The point to understand is that if you are willing to invest more , you get more (more often than not
).
I used to own a Norge and have graduated to Marantz. If i compare the two I find the sound signature of the Marantz more open and much more detailed than the Norge, however this after paying almost 3 times the price of a Norge amp.
It can be very easily said that from a price-performance prespective , Norge offers tremendous value for money and has a repetoire of extremely sturdy products both in amps and speakers.