Back around 2005 once I started getting deep into DT, I hunted down the DTIFC discs off eBay and other places, and the Graspop disc was one of the first I got. Great setlist and definitely a precursor for the band wanting to do a more heavy metal album (Train Of Thought). I'm sure them doing Graspop had some influence in wanting to produce an album that was much heavier than anything they had done before, and that set list is a great companion to TOT if you love the heavy side of DT.
-Marc.