If only Hegel made the H390 in Silver , might go some ways to reduce trade ins as aesthetics is a serious consideration at this price point. The Luxman 509x is veritable tank construction and at 63 lbs, would need to check rack shelves can handle this load.
Google pictures of the internal wiring of the Japanese made Luxman 509 versus the Chinese made Hegel 390 and speculate on that evidence alone which has the build quality most likely to serve you best and longest. That Hegel seems to promote they are a Norwegian company and not mention where their amps are actually made is another consideration.
I have a Hegel/ Magnepan combination that is totally revealing to the source. It is a Plain Jane to look at and I have drooled over the Luxmans many times since, but the Maggies are power hungry. Always look at what will make your speakers sound best.
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