Not trying to bite the hand that feeds me, but

I repair cars for insurance companies for a living. To qoute Ralph, "cheap isn't good and good isn't cheap" and that definately rings true with insurance companies most of the time.
My XBPW got in a major car wreck when she was 7 months pregnent with our son, not her fault, and Mercury took forever to pay and just nickled and dimed us to death and gave us major headaches and grief throughout the entire ordeal. Later, XBPW totaled the Tacoma, again, and Mercury was crap for coverage and tried for a long time to use aftermaerket China type parts for the repair.
Most insurance companies will not pay for aftermarmet accesories (sp?) unless you allow the ins. co. to inspect your vehicle, show them reciepts, have a rider added to the policy
before any of it is stolen or damaged. Then when it is damaged you will usually have to provide them with the reciept again.
AAA is an outstanding comapny. USAA (military and their family's) is the best. State Farm is pretty good also unless you piss them off and make an unrealistic comprehensive claim - do not do that with State Farm. Farmer's seems like good coverage and service but they're real picky about the aftermarket stuff they replace.
Lastly, most car insurance companies will not cover a loss that isn't bolted to the car. i.e.: subwoofer boxes, satelite radio's, cell phones, laptops, expensive shades (unless they're corrective), etc...
IMO