Which one would you get and why? Also, what would you guys recommend for a dac and amp setup. I have heard a lot about the Schitt stack , but are there any other good stacks for around the price point? Just wondering. Last question: For whichever headphone I am going to get (6xx or 7xx), I know that I will get an amp, but do you guys think that a dac really makes a $100 difference? Let me know. Thanks in advance!