I love the doublespeak here. People who want to own can only reap the benefit from a 25% price decline if current sellers take a hit. It's a zero sum game.
Taking a $200k loss on the way to trading up to a bigger house makes no sense at all. CB could have avoided buying at the peak of the market (he was warned) and still reaped the same $300k benefit.
Of course, the other flaw in your thinking is that Irvine new homes will be marked down by the same percentage as resale homes. Many of the posters here don't believe that will happen, so it will be a $200k loss on the way to what may be a home that cost just as much as it did prior to the downturn.
If you rent out the current house, you're not break even, but losing money on a monthly basis (even with the assumption that you'll never have maintenance or HOA increases). The renter neighbors you despise actually took the course of action that you should have taken.
The entire premise of why it made sense for you to purchase was because your wife wanted a new home and it was a forever home. That's now out the window and proves that treating a primary as a financial investment while evaluating whether it makes sense to buy is still the right approach.
Also, your home is not worth what the builder is selling it for. You live in a used house now, and much like driving a new car off the lot, you lose value immediately.