I'm the oppsite
On a cell phone I prefer the HD650.
On my meridian explorer I prefer the HD650.
Powered straight from my Anedio D1 it takes a lot of EQ'ing before I'm happy with the HD800 over the HD650. The HD650 I can listen to bone stock.
Powered by the Violectric V200 it's close, but the HD800 eventually wins and is good without EQ.
Powered by my Sonett 1 the HD800 wins hands down.
....but... the combo of Anedio D1 + DNA Sonett + HD650 is still a damn fun combo. If the source material is mediocre i prefer it.
Each to his own