A lean white wine that hasn't been aged in oak works best for this drink. You can make the citrus base (step 1) up to 1 day ahead; cover and chill. Reheat to continue. For a clearer mulled wine, in step 2 pour the citrus base through a fine strainer into the wine, then add the whole spices. Add a few fresh lemon, orange, and kumquat slices for decoration as well, if you like.