I honestly would not use a Nexus 7 because of the lack of storage. But I would use it for app testing and for hacking the heck out of a pure Android device.
Is it sad that I've spent the last hour making my ICS-running Kindle Fire look like a Nexus 7? lol I can't wait for Jelly Bean, though I'm not sure about the status bar on top; seems a bit of a reach...