Re: Operating system
"wifi is not standard on all of these?"
Where the hell did you get that idea from? What use would a tablet be without some kind of network connection?
Also, the Nexus 7 certainly has a GPS receiver and, although they're not mentioned*, I would be very surprised if most of the others don't too.
The update cycle is an annoyance for Android users. That one I'll grant you. Of course it can be avoided by sticking to the Nexus 7, or rooting it. I don't tend to suggest rooting phones, but I don't see a problem with rooting a tablet if you haven't bothered with a data plan.
*A bit of an oversight there, El Reg.