UK user looking for a new network to buy out my Orange contract

Wow, it's good to be back! I was wondering if anyone has any advice/experience of UK networks buying out existing contracts with other contracts.

I am currently with Orange on the 9700 but May is far too long to wait for the Torch.

I can but out my current contract for �231 and Orange (who I have always been with and highly rate their customer service) have not been able to come up with any startegies to keep me as a premium customer.

I know that networks have experience of enticing new customers over to the iphone by buying out existing contracts but any tips of the trade welcomly received!!