2003 - 2015. Draft for me is a step forward in terms of sequencing, a perfection of what begun around 98. From Untilted to Quaristice (with support from their live sets, which have a lot in common) there is a def change of approach in sound, and i think the drums start getting more synthetical (where Draft was more analytical). Quari live set brings the nords which are the base to Oversteps, pure bliss.
Then Exai for me is a sort of bringing all of it together,very rich and dense sound-wise, rhythm-wise, sort of a all-arounder. and AE_LIVE cause it is ridiculously compelling, when I think 'AE' i think these two last ones.
To sum it up imho these is the material that doesnt sound 'dated' in any sense (don't get me wrong i love the early stuff but frankly i think the sound is very specific to the time) but feels richer than elseq-onwards (there is a lot of gold on elseq for me tho, it is still in 2015 so)