Just wanted to add that Rogers is well known for their crappy customer service. I worked as a CS rep for them, and I know from experience. Also, the GSM network here in Canada has been less than reliable. Rogers began selling GSM phones to customers when there was virtually no GSM coverage in Canada at all. Mind you, they sold them phones and then told them that they could take the phone to Europe, purchase a new SIM card there, and use the phone overseas. Therefore, they should not be giving you issues for wanting to use your current phone once you get here (if I'm remembering correctly you recently purchased an iPhone).

Oh, and GST here is only 5% now. So, most provinces you're looking at 12% tax.