I would like to test and compare 2 premium headphones but did not see them on display in the Holesovice store. These two: https://www.alza.cz/EN/beoplay-h8i-black-d5254278.htm https://www.alza.cz/EN/bowers-wilkins-px5-grey-d5696477.htm Is it possible to try both pairs in the store? I won't purchase without trying first. Many Thanks Mr Ferguson