Meshuggah is possibly my favorite band ever. It's so amazing to hear their early shit and listen to what they're doing now and comprehend that it's the same band, they really did revolutionize a segment of the genre and virtually spawned an entire sound/feel by themselves.
If Contradictions Collapse was released today, I think it'd be hailed as one of the best thrash metal albums in history. Listening to "None" is like watching a transformation happen.. it's still the same old Thrashy Meshuggah from CC and Testbild , but you can tell they stumbled onto something new and spent a lot of time tinkering with it. DEI was a complete masterpiece and by the time Chaosphere came out, it was apparent that they were simply paving new ground.
Funny thing is, when I first heard Meshuggah back in like 2000, I didn't really like them that much. I eventually bought DEI and then Nothing (cuz the 8-string concept interested me) when it came out in '02, and didn't really like them much either. Then one day, in probably 2004, I was cleaning out my car, found the CD's, and gave them a listen. All of a sudden it made sense, and it's pretty much been an obsession ever since. It's the first music that I ever had to "figure out" how to listen to, but once I did, it became some of the most important music I own.