I am debating picking up a MA K7XX as I'm a bit of a collector and I have not owned anything from AKG.  I like a new addition to have "something" that my other headphones do not, perform exceptionally well in a genre/frequency band, or provide listening options the others do not. I am not going...

I am looking for a new headphone amp in the sub $300 range. Source will be a Pioneer universal player and a Squeezbox touch, perhaps a Modi Uber down the road. I already have a tube hybrid in the Lyr and I am looking for a solid state companion.   Need: Must have low output impedance...