First of all, do you realize that you do not need to do anything unless you want to make a call from your GV number; you can still forward calls from GV to your phones? And if you're using cell phones, you can make calls using the GV app, at least for now. I have Android phone, but I believe they have an iphone app too, although I don't know for sure.
Personally, I never really used my GV number very much at all, so I ported my known landline number to Anveo, but not using the Obi special, which would give me a few dollars in free outgoing calls. I didn't need that, as I already have unlimited cell phone calling. So, for only $2.80/month, I get unlimited incoming calls with Anveo, plus E911, but complete control over incoming call routing, much, much better than GV.