I had one of the Weihenstefaners at a bar in NC once on a dive trip and absolutely loved it.
When I got back to MD I went around and none of the stores had it.
I went online and found the importer that brings it in, and then found the distributors that they distribute to and then looked at what stores the distributor serviced. I went in and said I want to order a case of this "we aren't sure if we can get it, we'll have to check with the distributor", I said "I already did, and yes you can". LOL
I'm not big on porters mostly, but definitely when it gets colder I like to have one. Like you said, one is all you want. One goes a long way.
I made a holiday spice ale last year and an Oktoberfest too. Both of them were popular at the tailgates.
I need to get busy brewing more. I have 3 in the kegerator and the strawberry blond that hasn't gone in yet, but I'm not sure how much is left of what's in the kegerator. I'm running out of time to have a new beer ready by the KSU game. (I do forced carbonation though, so that cuts down some of the time at the end)