Just remember, this is a bear board. That doesn't mean they don't have a point. they are giving you the right advise from PURE financial standpoint of view. However, just remember there is also a emotional side of buying a house. It is little similar to having kids - great joy, but financially challenging from time to time. IMO, buying a house is not a pure business decision, in other words NPV is NOT the only deciding factor here .
My advise to you are as follows:
a. make sure you absolutely love the house after extensive research.
b. make sure you absolutely can afford the house
c. make sure you that you are planning to stay there for at least five to seven years if not more - considering your job situation, etc. For example: if you or your spouse wants to get a promotion, do you have to move out of the area? If you are a self employed doctor, or dentist with a practice in OC, then this is not an issue.
d. make sure you do your search on comps. You want to be lower than the lowest comps just to make sure you give yourself a bit room from the market to come down.
e. Discuss with wife or husband about how you guys feel about renting a house. For someone one like me, renting just not a thing I want to. In the current market, renting a house is not bad thing to do. There is no right or wrong answer. It is a personal choice and you don't let anyone to influence your thinking. Only you know how you want to live.
For most of the irvine community, I think you are safe to consider the above five issues. However, for VOC, I will add the following: the builder has proven to be very willing to cut prices. The market has been "trashed" by the builders pricing cutting. It might be good for the buyers, but once you become a homeowner there, that is not what you want to see. I think you will experience more price instability there than any other Irvine community.