hmm... i just had a listen to killswitch engaged album yesterday... they are not nu-metal at all.. they've got intense riffing... the only thing that makes them so called 'modern' is their vocal melodies that they have... other than that, i can find shades of at the gates, soilwork and aso carcass riffing... they have got a sweden thrash feel with a strong meshuggah/ dillinger escape plan touch.. one of the reasons why people may not like them is because of their image.. they really dress like new machine head.