Not sure, I used to go to bigger venues and smaller raves a lot in 2006-2008(then it was over due health problems)
but i think i will have to go with boys noize and alter ego.
Boys noize was just insanely good back in 2007 his livesets killed pretty much everything.(saw him to often I love techno, pukkelpop, lowlands ,Tivoli,etc)
Alter ego was just so weird live, in a really good way(Petrol antwerp)
talking about it am looking for some good minimal or electro event, suggestions are welcome (area: Netherlands, Belgium) missed out on pantha du prince this year
