Thanks @svosg13, I just received my Onyx M96 yesterday, and I'm enjoying it, actually, I really like it despite the 150ppi, I wish if DPT-S1 was easy to get in Europe, I would have bought one, I can really see the point of having a large ereader in less of 48 of using the Onyx.
Hopefully, in few month Onyx 13.3 or DPT-S2 comes out with higher ppi. I may go crazy and buy a used DPT-S1 if it's available in Europe in a reasonable price
Regarding DPT-S2 mentioned above, I'm hoping for one, I don't claim that there is one coming in few months, just in case.