The DAWs are a step up from the Sasha 1s but the Alexia 2 is a different beast. Bigger, deeper and more powerful bass, taller soundstage (not sure if there is a width difference in soundstage). They can be dialed in to your listening position and the room more than the DAWs.
As I've heard the Alexia 1 only in showrooms, I cannot comment on refinement of overall sound relative to the DAWs which are very refined and of a piece like the Alexia 2s. I think that Alexia line by virtue of their greater horsepower (for want of a better word) can be more thrilling----but I love the DAWS as well. Used vs new? That always presents a conundrum. That is also the only reason to consider the DAWs.