Mytek Liberty 2 DAC $1500 (1.74h, 5.5w, 8.8d) Mytek Liberty 2 is so good, and so fairly priced, that a good argument can be made for not having to spend a penny more, or less, in a great DAC. First of all, there’s no reason to buy an outboard DAC unless it whups what’s in your CD player or streamer. I’m telling…