No way will it go to 2499. I'm guessing it will be 2199. Even before the holidays it was at about 2199. I got lucky and picked mine up for 1850 on amazon a couple weeks ago. I say... pull the trigger and enjoy. It's a great lens and you get 2% back in an amazon gift card.
Also, if 2013 is anything like 2012, there are usually rebates so don't worry if you miss them.