I have Nexus 7 (and a Nook Color which the wife now uses). I really love the Nexus. The battery isn't really a problem if you're mostly reading books, surfing the net, email. Some of the games are battery hogs, but you can see which ones in the settings/battery screen. The display is always the biggest power user, so you need to turn the brightness down to the lowest level that you can still operate comfortably, and turn off the WiFi when you're not using it. I use mine several hours a day, and plug it into the charger every two or three days. Sooner if I'm playing games.
I just got a new racquet for my wife. Pretty good trade, huh?