Happened to some friends last year in Stockport. They were all in bed (they have two kids) and three balaclava-clad, wrench-wielding men got in the house shouting "stay where you are, no-one move and no-one will get hurt." It was like something from a film...
The alarm was going off and all the neighbours were out in the street but they carried on. They made off with their silver R32, which wasn't found for about 8 months, until it was recovered in Salford. It had been duplicated to one up in Scotland.
We have to be careful lads - take up martial arts!