I once made the bad decision to move to another network because of the device. It was 24 looong months of misfortune. I will NOT move to a network because of the device. Price, coverage and service will be the determining factors.
Good stuff. Due for an upgrade in June - can't wait to get rid of this pos Blackberry. Cell C however have been very good for me, not a days problem (except for the massive bis thing, which wasn't their fault).
Even though the device won't be cheaper anywhere, the provider may provide a better deal in terms of data and voice plans. Apple does not get involved in price wars simply because it sells a premium product.