ARC might have the deepest roots and MBL might have the wow! factor, but I'd be inclined to go with a company like Magnepan, Vandersteen or Rega. They still offer excellent products at real world prices. The MMG, Vandy 2, and RB 300 are the most impressive high end products out there for me.
Best High End Audio Manufacturer???
Wow, what a loaded question!! Nevertheless... which company has earned the right to be called number one, king-of-the-hill, top dog, etc. Is this even a fair question? Probably not. Is this your chance to make your objective/subjective voice heard? Yes indeed. So if you had to boil it down to ONE HIGH END COMPANY that more than any other represents the paramount position, THE EPITOME OF THIS HOBBY, this is your time to cast your vote.