I have the sony xperia Z ultra as my phone/tablet, it's great at 6.44 inches, I use a pencil as a stylus with it and an app called officesuite which works well, price might be a bit high though.
check out pricespy for prices(the cheapest place might not be the best place to buy from, I stick to PBtech, playtech, expert infotech, Ascent and the more established retailers) .
I would go for the newer version of the Nexus 7 myself.