Best Android tablet for reading eBooks?

So I'm big into reading eBooks and at the moment I buy books from Google Play (I have a lot of Google Play credit) and read them in iBooks on my iPhone (that 4-inch display isn't exactly the easiest to read on) so I've decided to look into buying a tablet for reading on. I don't need anything crazy, just a nice display (preferably 1080p so text is crisp) should be okay.

I'm debating whether I should just wait until the Galaxy S5 as I plan on buying one of those and just using that to read my eBooks on as that would be significantly better to read on than my iPhone. What would you guys suggest?