2008 X5 ordered in Canada

[vgbyn]

Hi I am new at this forum and I would like some advise on my situation.
I ordered in canada an 2008 X5 4.8 with premium,tech and sport w/20's and third row seats last July 31.
At that time the dealer quoted me with 2007 pricing and mention that they will adjust and delivery would be in November.
In September the premium option pricing and features had changed and increased by 1k.
My dilema now is the canadian dollar parity with the US and pricing should at least adjust fairly enven if it was 10%.
I went back to the dealer to negociate/delay or even cancelling til the prices adjust. I have a 2500.00 deposit and I was told that I was commited to the deal.
What would be my best option.