Hmm, well each has its pros and cons. First, we don't know how big the asteroid is, might be a small one and hit heaps far away from where I am, so that could be pretty good (not being self centred at all ). That said, all the better movies are about nuclear war, in particular On The Beach and I have been playing with that fallout calculator a what.
You know, give me a szchmearr of nuclear war
Evil clowns
or
Evil dentists