Bogleheads :: View topic - Umbrella insurance

I am planning to buy umbrella insurance to cover my primary residence, a rental property, and two cars. The quote I get is $279 per million. I have a few questions:

1) Does $279 per million sound reasonable? I live in a rather expensive area of California (Silicon Valley), so that probably makes a difference too.

2) I tried to get a quote from another insurance company, but that company says that since they don't insure my house and cars, they can't do our umbrella insurance. Is that the norm?

3) For the primary residence, I currently have $1 million in liability coverage. The rental property has $500k in liability coverage, and the two cars have 500k/500k liability coverage. Those are above the minimum ($300k for the houses and 250k/500k for the cars). It seems that I should drop the liability coverage on the primary policies to the minimum allowed by the umbrella insurance. Does that make sense? Any pitfalls in doing that?

Thanks in advance for your help!

Source: http://www.bogleheads.org/forum/viewtopic.php?t=81231&start=0&mrr=1314197064

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