Beyerdynamic DT880 32, 250, 600ohm?

I wanted someones take on the DT 880 600 Ohm it’s my first headphone that I ever got and I’ve loved mine since ive had it on my 789, I’ve damped it a tad more (lazily) with an extra foam pad from beyer that I got with some replacement pads. I was reading in this thread that tubes pair nicely due to higher output impedance from tubes. I only find its about a 5 or 7% so difference maybe I need to give it a listen again on my dark voices. Listening to my friends 6XX’s on the 789 its terrific on the Darkvoice its a huge change. I think tonight ill give it a listen again but so far its a minor change for me nothing major. Also does anyone have any pad recommendations?