Yeah, tough choice between BoC, Hecker and OPN. If you haven't experienced OPN yet, try him out (Daniel Lopatin). I'd probably start with his older stuff and progress through it as his newer stuff is more avant garde, but familiar if you progress from earlier stuff to newest.

His latest record is due out in November and from what I've heard so far it's even crazier than anything past, but still has the OPN sound even though the medium appears to be completely different.

EDIT: I actually find it hard to program to Hecker. There are certain parts of Ravedeath, Virgins, and Radio Amor, (among others!) where I am completely distracted by soundscapes!