I currently have a pair of (broken at the moment a900's), and m50's. I have a fiio e7 dac/amp. I am looking into buying some new headphones around the 300-400 dollar range, and the description of the hd650's sound characteristics is appealing to me. However, I also hear they require a nice amp to really make them shine. I was thinking of buying the fiio e9, which is a dedicated amp that the e7 can plug into (for those who are not familiar).
Would this combo of e7 and e9 be able to drive the hd650's sufficiently, or should I look elsewhere?
On a related note, is $390 for the hd650's a price worth buying at?