Good to buy samsung galaxy tab 2 7.0 right now?


I am in market to buy a tablet at the moment, have a rain-check receipt to guarantee the 100$ discount, currently $150 if I wanted to buy it right now. Is there an update coming soon for a Samsung galaxy tab 3 7.0? Also, I want to get android 4.1 or 4.2, is it possible with the samsung galaxy tab 2 7.0 with android 4.0 icecream sandwich?

Total noob at tablets, but if/when a later version of android comes out, is it free to download? Or do I have to get another tablet in order to get the update?