In my old 306 gti-6 I was insured with Direct Line. Sub and parcel shelf and face of HU got nicked in my work car park. The scum that did it also nicked my interior light. Anyway, I'd never declared what I had in there, but I got a call a week later, after calling up about the broken lock getting fixed etc, and the guy replace all my Sony gear (of which direct line had no knowledge) with all the latest Alpine stuff. Don't know whether thats just Direct Line or a case of me being lucky. The policy had £750 in car audio cover on it, but it didn't seem to matter if it was standrad pug stuff or aftermarket. Maybe depends on the insurance company?