I have a Bitfrost 2/64 and I like it a lot. It's somewhat unique use of 4 chips to split the conversion chores allows it to perform way above its price. PS Audio recently came out with a similar architecture.
But it's not end game. I plan to upgrade in the near future but I expect to pay at least 4x the price for something better. That may be a Yggi or something else.
But there's always something better and costlier.