First it was Mad Dogs, because....wow...supposed to be near giant killers and easily driven....or maybe an amp to give my HD650s something better than the E9.....then maybe HE-500s .... but they cost so much.....
And then I noticed Amazon Warehouse Deals had a slightly used, cosmetically scuffed (supposedly) set of HE-500s for ~$550. More dithering....finally....
What can I expect that I may not already know about? Yeah, the E9 is not enough, but a better amp will come within three or four paychecks (August is a 3-paycheck month). I don't mind the cosmetic flaw - a little wabi sabi to make me less sad when I ding or scratch them myself.
I was so excited I got next day shipping (already had Prime, so a no-brainer) even though I work tomorrow night.