I wish we could quantify all decisions we made or plan to make in life, then we are either an over-analyzer or procrastinator. Everyone's situation is different from other's. And I guess sometimes one needs to value his time / relationships in addition to money, put these into the decision equation and make an educated choice.
Personally, I bought my first home in 2003, anticipating a price drop up to 20%; invested in a foreclosure at the end of 2007, knowing that it might not be the lowest price yet. Do I regret my decisions? Not a bit. If I waited till today, I would have wasted hundreds of thousands of rent money and tax benefits, I would have squandered my savings, I would have not been able to qualify for a loan today.
Congratulation, Gas, and enjoy your new home.