I have narrowed my results to these 2 headphones from avshop.
The one being the Beyerdynamic DT 770 Pro 80Ω - http://www.avshop.ca/sound-amp-pa-audio/headphones/over-ear-headphones/beyerdynamic-dt-770-pro-80-ohms-headphones
The other being the Beyerdynamic DT 990 250Ω - http://www.avshop.ca/sound-amp-pa-audio/headphones/over-ear-headphones/beyerdynamic-dt-990-pro-studio-headphones
Both relatively close price and I have a price match for the DT 770 to be $182 CAD.
I will be using these headphones in doors and not in public where so sound leakage isn't a huge deal.
I like to listen to DnB and EDM type music.
I will be hooking these headphones up to my Astro Mixamp 2013 edition and would like to know if it is able to drive the 250 ohms.
Feel free to give your opinions and ask questions! Really appreciate it.