Why I Hate Rewrites

I'm in the midst of rewriting my opening seven pages for the Emerald City Opener Contest. I've now, officially, spent half an hour staring at potential first sentences and agonizing that I might not pick the perfect one. So now I'm soliciting opinions from others. Which one do you like better? HELP ME!

Option A: "In the midst of her boyfriend’s achingly appropriate birthday party, Jessica Jo Carter began to think seriously about leaving him."

OR

Option B: "If it hadn’t been for the Gouda cheese, Jessica Carter’s whole life would have been entirely different."

I modeled that second sentence off of my favorite opening line of all time. Bonus points for anyone who can identify the original! (And if you are one of my friends that regularly visits this website but doesn't leave comments... please make an exception just this once!)