Prepare burgers as recipe directs, and keep patties refrigerated until ready to cook.
In a small bowl, combine cheese, mayonnaise, sour cream and vinegar until blended. In a separate small bowl, stir together hot sauce, butter and honey until blended.
Grill or broil burgers as recipe directs. Toast buns. Spread 1/2 Tbsp. blue cheese mixture on bottom of buns and top each with a burger. Spoon hot sauce mixture on top, drizzle with dressing, top with remaining bun half and serve immediately with assorted toppings, if desired.