My vote goes to Renaissance Chaoyang. I think on balance of price and location, it may be best all around. And it is easy to find. Switch! sounds tantalizingly delicious but trekking out to 798 wouldn't be my first choice (but if everybody else votes for Switch, I will certainly come as will friend.) Chef Too's seating times are too constraining.

I could also deal with Union Bar and Grille (Sanlitun Village) but not everybody is thrilled with their normal food (I've had good experiences there). Also Culture Yard in Gulou I'd be willing to try (never been), but the location might be a bit more hassle.