You can start by checking out Hi Fidelity, a Polish audio review site:
http://www.highfidelity.pl/
and
http://hifi-products.com/msearch.cgi?HCountry=PL&search=%20Search%20&Amplifiers_Check=on&Speakers_Check=on&CD_Check=on&Tuners_Check=on&Turntables_Check=on&Headphones_Check=on&Decks_Check=on&Furniture_Check=on&Cables_Check=on&Accessories_Check=on&Page=3
All the best,
Nonoise
http://www.highfidelity.pl/
and
http://hifi-products.com/msearch.cgi?HCountry=PL&search=%20Search%20&Amplifiers_Check=on&Speakers_Check=on&CD_Check=on&Tuners_Check=on&Turntables_Check=on&Headphones_Check=on&Decks_Check=on&Furniture_Check=on&Cables_Check=on&Accessories_Check=on&Page=3
All the best,
Nonoise