I think the chance of getting new value for your totalled car is pretty slim, unless it was written off in the first year or you're paying extra for GAP insurance.
My car got written off by an insurance company last year after someone drove into me. I ended up taking a settlement and getting the car fixed myself, there was no way their write off settlement would by me anything like the car I was about to lose. I also hate "throwing away" something mechanically sound over a few body panels, some panel beating, and some paint. And it is certainly not the 'green' choice either!