I'm more into Black Metal than Death Metal, really depends on what you mean by "heavy", but if you're looking for chaotic, fast and hateful bands, here's a few right off my head :
Infernal War (Poland) :
http://www.myspace.com/iwofficial
Antaeus (France) :
http://www.myspace.com/antaeusdpe
1349 (Norway) :
http://www.myspace.com/1349official