I appreciate all the replies, very helpful. It looks like I will be going for the Sennheiser HD650.
In regards to power/head amp/source/amplifier - these concepts are all new for me so I will be doing some research to learn more. It would be a waste to buy great headphones without unlocking its full potential.
In regards to power/head amp/source/amplifier - these concepts are all new for me so I will be doing some research to learn more. It would be a waste to buy great headphones without unlocking its full potential.