Thank you guys for such detailed information about this! I have done a bit more research on this and it seems to me that finding the right amp is really about first matching the correct amount of mW output relative to the Ohm rating of your given headphones. Also in reference to Tube based amp's...

Ok, so for the sake of metaphor one could say it's like the power on a car yeah? First gear might start of fine but without proper power output your not getting to fifth or sixth gear. The more I read about the Q701's the more I like :)

Thanks for the Quick reply! I read about the AKG's but i'm a little unsure about what kind of amp it would take to get the most out of them. As far as Impedance goes The higher the OHM level of the headphone, the more powerful and AMP needs to run them is how I understand it. I will do some more...

Just wanted to say first that I have been reading/researching this forum over the past few days and wow! the shear amount of info is staggering. I've read the headphone guides and reviews of DAC's i've been looking at but I guess what I want to know most is how to get the most appreciation/value...