FWIW, the markup from manufacturer cost to finish product is usually about 10X. Dealers typically pay 40-60% of retail, so for the amp in question:
Retail $1900
Dealer Cost $950
Manufacturer’s Cost $190
Should you expect better parts in there? Cheap caps can cost 10 or 20 cents in bulk. Good caps can cost $150 or more. Each. You could buy the Roksan and replace the output caps if you wanted to. IMHO, the cost of the caps is commensurate with the price of the unit.
Just my 2 cents.
Welcome aboard.