Just bought a pair about a week ago and have been listening to them ever since. I absolutely love these headphones. They wouldn't be my first choice for modern music (for that I have a pair of X2HRs) but for jazz, classical, and some classic rock they are beyond my expectations. Can't go wrong for $150. Although, I like many others despise the ever living crap out of the included cable. Thankfully my Hart Audio cables are on their way to replace it. Now I just need to start looking in to a balanced amp to really drive these even more.
Or, if you are looking for a all-in-one solution honestly any of the newer mid-tier DAPs are fantastic also. Most of the better ones (around $200-$400(ish)) are pushing 1W or better. I have the DX160 and I am absolutely loving it. Not being pinned to my (insert type of furniture here) has been great. Just my 2¢!Just get a Fiio K5 Pro for just 150$ or maybe for even cheaper. I know it is not balanced, but even in unbalanced mode it pushes out 1.5W into 32ohm!!! It drives my HE 400i 2020's perfectly