Though maybe not totally IDM, and more jazzy (space jazz that is), I'd
try some of the Ninja Tunes releases, e.g. 9 Lazy 9 and some wonderful
compilations. The NinjaCuts compilation has some very spacey stuff from
ColdCut, really good.
Throbbin Pouch though has to be one of the best stuff released this year.
The CD and the At Mos CD are just great.
Mohsen