I would be very surprised if you can get a discount on the E93 at such an early stage - unless you are a repeat customer with a long-standing relationship with the dealer. At best you may get some of the dealer fitted options thrown in.
Discounts can be obtained on new models if you import or source through an intermediary such as http://www.bmwbuyers.co.uk/new/
. Check them out and enquire about the E93.