Which tablet should I buy?: Nexus 7 2013 vs. LG GPad 8.3 GPE vs. Wait for Nexus 8

So I began my post-graduate studies and given the fact that 95% of the texts of the classes will come in pdf format I have decided that I will buy a tablet because I can't afford to print all of the texts and I also get heavily tired reading from my laptop.

Since I'm on the Android bandwagon, I came up after doing my research with four finalists, then they became only three (actually just two devices are real) after discarding the Nexus 10 since by present-time standards it's really outdated.

So, mi final candidates are the Nexus 7 2013 and the LG G Pad Google Play Edition (stock Android ftw)

OR...

*drumroll*

I was thinking if it would be better to wait for the brand new Nexus 8 (I mean, we know it will be real sooner or later this year, mabe at Google I/O) since the final two are kinda old (not that much, I know) right now.

So yeah, what do you guys think? Help me choose!