Same with Accuphase, although now I see a few reviews on the lower end line.
I do not have personal experience with Luxman and step down transformers, I have read that there are no issue with that setup. Might affect resale if you decide to sale. I recently purchase a Accuphase integrated for less than half what it would cost me in the states from Japan,.The ebayer I bought it from had it converted to factory 120. The unit arrived 4 boxes deep. I took the top off to see If I could detect any solder work and it just looked brand new inside. Needless to say I was very happy with the deal. I understand luxman and Accuphase are somewhat similar in sound, and if that is the case, I can tell you, my Accuphase is one of the best integrated I have ever heard in my room. I own a Pass 250, Macintosh 352, Hegal 390. These all have there strength and weakness, but as of now I cannot find much fault with the Accuphase and I hear the same about luxman.