Trauma... is the best polish bands of course
they're from Elblag, like Martex
and i like them personaly, they're very nice, funny guys
i love watching their on the stage, they're killer machine. much better than Vader or Behemot - it's truth!!!
another good bands:
Misteria - orginal black/death/doom with clean and black vocals. in september they should release their second album.
Demise - melodic death. they realeased 2 albums
Dar Semai - the best polish-swedish band, but to sad they didn't released their debut...
Elysium - good In Flame'ish band
Devilyn - if you like Morbid Angel and Immolation, check this band
but of course the best band on the world is
ENTER CHAOS