Well, before you look at a kindle, have you tried to look for a used 8gb Nexus 7? You wouldn't have to mess with rooting, (unless you like that sort of thing
Hey, are you reading my signature? Read the next post...
Kindle Fire: RIP (Screen died)
Nexus 7: RIP (The screen cracked, for no reason. Grrrr Asus Support.)
Kindle Fire HD: Amazon 7.4.6. Possibly rooted......
Nexus 7 2013 32GB Wi-Fi: Stock! This thing is awesome!