I'm getting ready to buy my first tablet computer and I have some fairly specific things I need it to be able to do so that it can be an effective tool for my research. I need it to be able to compile TeX for one, and this seems to be difficult for tablets. I also need a writing program so I can take notes by hand in seminar and to prepare my lectures (e.g. Goodnotes for iPad). Finally, I'm hoping to find a way to edit PDFs (e.g. to add marginal comments or to highlight) and to be connected to google drive. There are probably features I should care about but don't know about yet, and I'd be curious to hear what other things mathematicians have needed their tablet to do. And of course I'm hoping for a recommendation for which tablet to buy which meets my needs.
There was already a question on this topic back in 2010, but obviously those answers are far out of date and the question was closed as no longer relevant. There seems to also have been an issue about spam. Is it appropriate to ask this question on the main site given the history? Is there a better place to ask it where I'll be able to get feedback from other professional mathematicians?
EDIT (after quid's answer): I agree that shopping list questions are bad for mathoverflow, as they detract attention from what's important and become outdated quickly. If I were to ask about tablets on the main site then I'd be trying to make something more permanent. So I've changed the title of this question to reflect that. The key point in my first paragraph is "I'd be curious to hear what other things mathematicians have needed their tablet to do" not "tell me which tablet to buy." Hopefully a list of good features that a tablet can possess would be a bit more permanent than just telling me what's the best one on the market right now. However, even this list of features would get outdated quickly and the question would eventually be closed, and so I'm still left wondering the best way to get this kind of advice from the community without clogging up the main site with another closed question.