I think Psychic TV's "At Stockholm" would be a good one to mix in
every now and then - lots of wierdo whales/speech etc with
the occasional rhythm. That is, it would be Ok if you can stand
the blokes voice ;-)
Other good ones include the first track on Caberet Voltaires Plasticity,
and any early mid 13th to 14th century lute music or choral works (e.g.
Sanctus) for short bursts.
Mark