Hello All, I have an iPad mini that I enjoy very much. It is a 16 gig celular model that I used to tether when my iPhone was jailbroken. For those who have the new retina model is it worth it to upgrade or would you keep this model? I do not keep a data plan on it and as soon as an iOS 7 jailbreak is available I will be tethering it again. IS the performance upgrade realy noticable or is it just needed to run the more advanced screen? I want to upgrade but really do nt want to spend over $530 when my current mini is running great.