I'm thinking about getting a tablet for use at the gaming table. I'm looking for something in the $300-$500 range, probably with an 8" screen or bigger. It absolutely needs to play nice with PDFs and web browsing, but I'd also probably use it for watching youtube videos and netflix when I'm not gaming. Expandable storage via SD card is highly desired, and it absolutely must be Android (I hate iOS and Win8). Top contenders right now are an Nvidia Shield Tablet, Nexus 9, and Samsung Galaxy Tab S.
Does anyone have any experience with this kind of thing, or suggestions for other tablets to look at?