chemical brothers 'come with us' is a good one...though it's not really 'techno', it has great beats.
check out stanton warriors for some electronica mixed with a little bit of the oldskool hip hop...same with RJD2, though he's a bit more classic, like jazz beats on top of electric hip hop
markus intalex is pretty speedy...but my favorite stuff to exercise to is LTJ Buken
i like music threads...keep it coming guys