Ok guys I finally went with the Lehmann Black Cube for my HD800's. Mainly because I read somewhere that Icon Audio HP8/MP3 is only designed in UK but is manufactured in China. Nothing against made in China, my Macbook air is made in China. But to be very frank how much of that £600 asking price for this amplifier is attributed to the fact that it has a designed in UK badge on it.
It's not so much the location where it was designed, but rather the people who designed it. Icon is a legit company who has been around for a while. They have a solid history behind them making tube related audiophile gear. So that quality shows in the HP8. Yes, you can find a Darkvoice or Little Dot or other quality amp designed in China, and those may be good options.... or you can go with a device made in Germany. Nothing wrong with that.
While we are at it though - you actually pay a lot more for the device being made in Germany as compared to China. I don't know about Lehmann at all, but Violectric is a German company who does everything local. They pay a lot more for their labor, their facilities, their taxes, etc. And that all gets passed down in the final price. Is it worth it? Depends. I love their gear, and I love the Icon HP8. The Violectric gear could be cheaper if it was outsourced to China for production. The Icon would be significantly more expensive if it was built in house at Icon HQ in the UK.