The old Simplicity vacuum smoked the motor today but served us well over 14 years so time to get a new one.We have 3 levels of mostly light colored carpet, 2 carpeted stairways of 14 steps each & probably about 1200 square feet per floor 80%, carpet 20% ceramic tile. The carpeted stairs are a PITA to do & we need quick change from carpet to ceramic tile. The lighter the better especially when vacuuming stairs. Price is not an issue and willing to pay for a quality vacuum cleaner. So what it best??