I usually keep my more specialty beers (non-everyday beers) in my temperature controlled kegerator in the mid 40s. If you don't have the space for a kegerator, I have seen small temperature controlled wine chillers that can hold 4 bottles.
"Whoever drinks beer, he is quick to sleep; whoever sleeps long, does not sin; whoever does not sin, enters Heaven! Thus, let us drink beer!"
- Martin Luther