Well, IDM can cross over into ambient. My usual definition of ambient is
mostly beatless (or a very minimal beat) and chill. IDM goes more experimental
using computers to distort beats and whatnot. In my book: Boards of Canada
is a mix of ambient/IDM, tosca is downtempo, squarepusher is IDM ...
My choice of labels to check out if you want to hear more IDM is: Merck,
Warp (seems like you already found it), morr, musik aus strom, hefty,
toytronic, and ninja tune. Those are all basically IDM, and they are quality ...
Mike Jedlicka
www.dickandjanerecords.com