Listen...chair

I have a stressless as well but it is in my reading room
it is very comfortable, expensive but worth it
I throw on some classical or jazz or fm and listen remotely

a leather couch is more practical for my music room

ymmv

+5 or wherever we are for the Ekornes Stressless. 

When only the best will do....
http://www.hermanmiller.com.au/products/seating/lounge-seating/eames-lounge-chair-and-ottoman.html

If it's got foam cushions in it like the IKEA chair I'm out.

I’ve been happy using Wassily Chairs my wife and I purchased back in the 1970s. And I would expect any effects they might have on sonics to be very minimal compared to most other kinds of chairs. Various knockoffs are available at much lower prices than the genuine article shown at the link.

Good luck. Regards,
-- Al