I recommend you to have an Android OS. It is an open source OS wherein you can have anything for your applications.
And Linux OS is somewhat similar to Android for phones. Using linux would have lesser having virus attempts into your PC, like to android with your phone.
Better stick to Android it's amazing and Open source.
Well I too think that Android would be a Great Option for your Tablet and Many are using Android and Also the Latest are coming pre-installed with Android..
yap Android is based on Linux Kernel and iOS is based on Unix kernel. Both are resistant to virus. But I think Android is quite better as you can mod the way u love and there are also roms in the net as its an OpenSource
I agree, the Android os is great for mobile devices. Android - runs on arm so the devices are thinner and lighter with potentially great battery life. Built for touch, but with more options, more notifications, more access to the system, and more "tweakability" than iOS, but you trade off some stability to get that. You get the option for phone functionality in some of them, but until honeycomb it doesn't always play nice on higher res screens.