I'm now mining Dash with both Baikal miners and iBeLink miners. The prices have gone up quite significantly from when I first brought with them, and the technology has moved on quite a bit as well. I have heard some bad stories about people not getting their machines from Baikal, but I had no issues with them. I also had no issues with iBeLink, although I believe now there are some pretty lengthy wait periods until you actually receive your machines. And I'm not sure about any US manufactures.