Probably my favourite thrash metal band. I love all their albums but my favourites are "Vision Fugitives", "The Music Of Erich Zann" and "Dances Of Death". There were more technical and complex thrash metal bands than them (like Watchtower or Toxik) but Mekong Delta were pretty atmospheric and sick. Especially in "Vision Fugitives", they managed to play .. "emotional thrash" their music in general is pretty intense in a really psychotic way (mostly their 90s albums), it gives you a feeling that someone is constantly chasing you .. or something. Basically what made them special (for most of the world) were the covers of classical music themes they did (like the one Burkhard mentioned), especially "Pictures At An Exhibition", were they dedicated a whole album to cover the same titled Mussorgsky's piece.