please suggest cool hardcore for me

[Helm]

Does grindcore count? Get The Poacher Diaries split by Agoraphobic Nosebleed/Converge. Some of the best material by both bands. Umm.. if you like Isis Old Man's Gloom etc obviously get Neurosis albums. Through Silver in Blood and Times of Grace, mainly. Cult of Luna are excellent too. Mastodon are going to kick your ass. Get both 'Remission' and 'Lifesblood'. Candiria are ok. Caliban are simple and nice. Knut are awesome. Then you could venture into more technical territory by picking up stuff from The Red Chord, The End, Botch, Human Remains, East West Blast Test, Dischordance Axis, Crowpath, The Dillinger Escape Plan etc etc