I’ve had extensive use of the dag progression integrated and luxman 509x in my system. I find the luxman to be an outstanding product all around. It’s a neutral sound without much editorializing. It’s definitely a high end sound in a luxurious package. it’s not however a lower cost dag. the progression unit is clearly a higher end sounding amp. It’s more refined and has the best midrange that I’ve personally ever heard. The dag to me is a richer sounding amp which might not be the best match with speakers that aren’t very neutral. Both are great units but the difference in sound quality is reflected in the price of admission. IMHO
