I have a 1050 and am looking to get a set of headphones for quiet time listening in the living room (primarily for movies). I would like to use the 1050's headphone output to automatically switch off the speakers and a cable extension to reach my seating position.

I am thinking of either a Grado RS80 or RS125 or possibly either the Sennheiser HD-555/HD-595. My daugher uses the Grado iphones (similar to the RS60) which are okay but lacking in the sound stage.

Does anyone have any experience running these through the 1050 or another Outlaw product? I really do not want to have to outlay the cash for a headphone amp at this point in time.

Finally, when I eventually get around to replacing my 1050, I was wondering if the Dolby Headphone feature really work when watching movies.
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Living Room 24x18 open 1/2 flight up to a raised dining room/hall 24x12
Outlaw 976 pre-pro running 5.1 system
Outlaw 750 for Artison Masterpiece LCR and 2 NHT SuperZeros rears
Velodyne Servo FX-1200
LG OLED65C8PUA via HDMI2 to/from 976 HDMI ARC
Roku Ultra
Samsung BD-D5500 BluRay
Amazon FireStick 4K to 976 Aux HDMI input for Amazon Music Ultra