I'm tempted to add that if you are visiting the Lama temple (a good suggestion I should add) - and given that you are a foodie - that you should also pay a visit to Jindingxuan (the big restaurant just north of the Lama temple, across the second ring road).
However, I haven't been there for a few years and have heard from some people it is not as good as it used to be. Any other FTers have any recent experience with this place?
PS: Just arrived back in Beijing yesterday - in time to celebrate the New Year. Best wishes for 2012 to all!