If I were you I would phone and ask for a quote then decide if you are prepared to pay that amount, you might get a good deal with it being so close. The only thing with waiting until you check in would be the disappointment of finding that all the gold seats had gone.
As a guide we paid £155 each this week for our holiday in October. Should have been £179 but she deducted the £24 per person we had paid for prebooking our seats. Hope this helps.