I always say go by looks and weight. I love the look at that Luxman but they are ultra-rare around here, the only one I've ever seen was curbside in Paris, I posted that in a recent thread. The Luxman is going to get looks because it's a nice, sophisticated looking unit.
Sony's have officially hit the radar over the last few years, they were the leading bargains for the last 25 years. I'm not sure why, maybe they are a little plainer and Sony's Name was everywhere so there wasn't a rush to grab them. My biggest issue with the 70's Sony's is they all seem to need a weekend at DeOxit's, the pops, crackles and low volume seem to be built in. They just don't get respect but I do love the McDonald's Orange Colors they emit and if you can find the matching components they can look very nice.