I picked one of these before vacation a couple of weeks ago.

Sam Adams Chocolate Bock from their "Utopian" series of beers. It was $15 for a 24 oz bottle. I thought that was sort of a silly price, but figured it would be a nice treat for vacation.
It did not disappoint. We didn't have any beer glasses at the cabin, so I drank it out of a wine glass over the course of an entire night. The wine glass proved appropriate since I pretty much drank the beer like you might drink a bottle of wine.
It definitely got better with time. Letting it breathe actually seemed to work, and the room temp was probably closer to the appropriate temp for drinking.
Not a very bold beer, but I loved the chocolatey nutty flavor.
Not sure that I'll pony up the big bucks again, but I enjoy trying all of Sam's brews.