We have ALL of our personal property covered at replacement cost as opposed to actual cash value. In CA, no specific rider is needed for anything on the standard ISO insurance form (other than jewelery worth over $25k but we don't have any of that). We did this in order to ensure if there was a fire (we are in a high danger area), we could actually BUY new business clothes as opposed to getting ACV which would be very low.

When my 6 year old Eddy Merckx bike was stolen from my car this spring, they paid replacement cost for my new Pegoretti with Record 11 without batting an eye.

We do pay more for this on our premium, but I don't think it's more than a few percent of the price of the whole policy. (And no, I don't know if our premium will go up because of the theft, but I do know we were going to be eligible for some sort of no claim discount right then and now we are not. Oh well. That's why you have insurance.)