I have two amps: Schiit Magni and JDS O2, I got them because I got the AKG K7xx cans and my AVR would not drive them. My vintage receivers had no problem though (not surprised). I use the amps for all my cans now, why not?
EDM is not one of the genres I listen to, but I am diverse. My usual is rock (prog rock, classic rock, folk-rock, post-rock, etc.), jazz (bebop, improv), classical (orchestral, chamber and baroque), folk, blues (blues-rock, acoustic, electric) and a number more. So for me it is paramount that cans (as well as speakers) be tuned to do well with all the genres I listen to and I like detail.
That is why I like my Status Audio CB-1s a lot. They are very neutral and yet really balanced and detailed. They perform well above their price. The only thing that comes close are my Takstar Pro 80s, but they are not as neutral of course.
I understand the HD650s are on the warm side, but in all the reviews I have seen all say the HD650s while warm are very detailed. (They also say they are true "audiophile" cans, which I don't give two shits about). While I find the sound of my HD518s to be a bit too warm, they are the most comfortable cans I own.
That said, I may like the HD650s better as they have different drivers at least. I have joined the drop and realize the risk of the over-promise/under-deliver scenario that permeates the industry. If I do not like the HD650 much (if they sound just like my HD518s for instance), I will just toss them and never purchase another pair of cans again. I'm happy with my $70 CB1 and Takstars.
If I like the HD650s, they will immediately replace my AKG K7xx!