The way I see it,
right now, average homes around large cities in CA are around 400K. In the big cities themselves, its much higher. The homes are artifically inflated because, a lot of the investors are people from the big cities who have taken out second mortgages, equity lines, etc to buy two or three homes in the surrounding areas thus inflating the values.
People with average jobs in CA can barely afford the 400K homes with the low interest rates. When the mortgage rates rise above 6.5%, there's no way they can afford it. That's when the home values will have to drop. I think that drop will make alot of investors go into a selling frenzy and it'll cause the home values to drop steeply.
Think about it and don't buy if you feel the rates may rise with the booming economy. If you think the rates will stay low for another few years, then buy now and buy based on variable rates.