Usually I listen to the podcast but don't get around to watching the film in time, so I rarely vote. However this time, with two films I know very well, I was gearing myself up to coming here and posting my opinion...
... however Graham was so clearly right that there's no point. Brian is a better film BUT if we can only put one major Python film into the canon, then it should be one that represents the nature of Python better, and that is Grail.