If you go to Ting, make sure you use wifi as much as possible. I remember you saying you use about 3GB of data a month, that would be pricey on Ting. Ting is probably the best option for light to mid users of data and minutes, but if you're a heavy user, it'll get pricey. Thats the way "pay for what you use" works imo

The port to google voice (which i did like 3 years ago and vaguely remember) takes some time, like a day or so. What I would do is wait until you get your new phone up and running, then port your old number to Google, then once the port is complete, register your new phone # on your GV account online and begin forwarding calls.