Say 70 - 74°F (21 - 24°C) I normally do what the books say and rest somewhere in the 60s but this means brining my fermentation freezer up to that temperature. I am mostly an Ale brewer so normally this is not a problem as I only have one lager fermenting at a time. Just curious what other people are doing.
What you describe is exactly what I do. I move my fermenter from the basement (~50°F) to the study (~70°F) and leave it for 2-3 days before racking it to a keg for the lagering fridge.
Since primary fermentation is done and most of the sugar has already been metabolized, there's little or no danger of creating estery off-flavors from the higher fermentation temp. That's more of a worry at the beginning, when fermentation is first taking off and the yeast are thriving on all the sugar.