Thank you all for your help and opinions. I just purchased the Fiio E6 portable amplifier, based on a lot of the recommendations I have seen of the E5, and am about to place an order for the ATH-M50's.
Just to ask. I really like the low bass of the Beats Pro. What can I expect out of the M50's? Will I still get the nice thumps from lows and mids? Really excited to have some good headphone finally. =)