I haven't got any GoDaddy domains so I haven't done it personally, but I think people on the other top story about how to leave GoDaddy had all that solved.
You could use the tools to export all your domains, get the transfer codes, drop those into NameCheap (with the SOPASUCKS coupon) all at once, then go back to GoDaddy and confirm the transfers to avoid a long wait. And they even let you keep the time you had registered.
You could use the tools to export all your domains, get the transfer codes, drop those into NameCheap (with the SOPASUCKS coupon) all at once, then go back to GoDaddy and confirm the transfers to avoid a long wait. And they even let you keep the time you had registered.