Man that is a tough question. Beating a division RIVAL (to the 49er lurkers, you know who your rival is even if you wont admit it) would provide much more drama. Playing Americas team ( hate typing that, WTF, who anointed them the title and do they know it's 2013???) would make a lot of mediots look dumb again.
My vote is for 49ers. The Hawks will have their hands full with them in the next regular season game, wouldn't be surprised to see the 49ers win that game. Knocking our division rival out of the playoffs would be huge on so many levels.
Besides, Romo has performed the most choke jobs by any QB. His luck is due to change at some point. Just remember his legacy started in Seattle. If this same situation where to happen again do you think the coach would put a different holder in?