After several months of having these, I personally think that these pair of canz are amazing (with a dac amp of course). As long as you have something that can definitely power these canz you'll enjoy every second you have these on your head on whatever you're doing with them. Just don't do what I did and not get any type of amp after getting these.
A phone itself easily powers these headphones. You don't need a powerhouse amp. I have a Oppo HA-2 and it sounds amazing. There are many other great choices at lower price points, but what price range are you in for a DAC/Amp?