[DJDREEM]

As above I like warmth. My current Little Dot MKII is a bit too bright for me.

 

[PurpleAngel]

As above I like warmth. My current Little Dot MKII is a bit too bright for me.

 
I'm sure the E09K can drive the 300-Ohm HD650s.
 
Maybe just swap out the tubes on the MKII for hopefully something more to your liking.
Might try asking here.
http://www.head-fi.org/t/563884/little-dot-tube-amps-vacuum-tube-rolling-guide
 
Or asking here about what bring out the best in the HD650.
http://www.head-fi.org/t/197776/sennheiser-hd650-impressions-thread