As I've mentioned somewhere else, when buying audio equipment it must have three thing's, Sound quality, Build quality and Looks, and my source gives me all three in abundance. However in the UK it costs £15,000, but I'm sure if it could be bought directly from Teac it would probably go for £8,000 or £9,000. One of the reasons why I've got and are getting my headphone amps from Headamp is because they're got directly from Justin, which in turn means big saving's. Justin's amps also give me the three thing's I look for, well at least the BHSE and Pico Slim do. I haven't heard the GS-X and Aristaeus but they look very nice, especially the Aistaeus, I've no doubt the build quality will be top notch and the sound quality will be amazing.
The K-01 cost me £10,000, but I used my previous headphone system as part exchange.