[DiapDealer]

I'm buying almost exclusively from Kobo at this point. And reading exclusively with Mantano. The conversion from Kindle to epub is certainly simple enough for me, but as time goes on, I find myself less and less interested in diddling my purchases before reading them.

And since they (Kobo) seemed to have stopped automatically making all EPUB3s into unADE-able kepubs, I haven't run into a kepub-only book for a long time. Which means I have very little need for a desktop application in my purchase/read/archive workflow.