A high wattage (input power) doesn't always mean better suction because the amount of this power that's turned into air watts (suction or output power) depends to some extent on the vacuum's design and efficiency.
A vacuum cleaner is probably the most expensive cleaning tool you will buy so it's important when choosing your next vacuum cleaner to make the right decision.
If you're confused about the difference between cylinder and upright vacuum cleaners or the benefits of bagged and bag less vacuum cleaners, our buying guide will help you choose the right vacuum cleaner for you.
If you have a large house to vacuum, or would like to vacuum the stairs in one go, make sure your new vacuum has enough hose and lead length. It's rather frustrating when your vacuum won't quite reach into the corner and you have to go back to the power point and replug into another one.