My 3yo unrooted TF201 hangs on boot screen with dots running in circles for hours both before and after 'factory reset'. I'm assuming I now have an expensive door stop. Next question is replacement. I can have new TF201, new TF701, Google Nexus 9, or Google Nexus 10 all for prices in the same relative ballpark. Can also get Samsung Galaxy Tab S 10.5 for $150 more. What to get and why would be appreciated. Yeah, I know Nexus 9 runs Lollipop, but neither Nexus has micro sd card slot so that's a strike against.