Where in Poznan can I buy a good office chair? / Gdzie w Poznaniu kupię dobre krzesło biurowe?

I work remotely and look for a good ergonomic office chair. The IKEA ones don't fit my needs as I spend a lot of time at the desk.

I need a quality chair that will be good for supporting me for 6-8 hours per day. Not Herman Miller or ErgoHuman, but something alike.

Is there any place in Poznan with a wide selection of office chairs where I may also try sitting on them? I know I may buy online, but the return is problematic if it doesn't fit me.