Arguably the two best Android tablets on the market right now are the Nexus 7 made by Asus and the Nexus 10 made by Samsung. I prefer 10" tablets so I just upgraded my old Xoom to the Nexus 10. It's an amazing tablet. Keep in mind, by getting a Nexus tablet you are getting a "Google Experience Device" which means no bloatware from the manufacturer and updates straight from Google the day they're released.
Edit:
techbeck, on 30 November 2012 - 01:12, said:
Or you can always hold off and wait for the Nexus 10 to come out. Full vanilla Android out of box.
It is out, unless you mean on sale at Walmart...
Just get one from the Play Store.
16GB for $399 or
32GB for $499.