According to the search results, the Miele Complete C3 is the vacuum with the best suction. It has a powerful 1200W motor that allows it to deal with stubborn messes or debris stuck in cracks. It also delivers fantastic performance on bare floors and does a great job dealing with debris on carpets. Its seven-level power adjustment function lets you adjust its suction force to clean everything from window curtains to high-pile carpet with a few button presses. However, other vacuums with good suction include the Dyson Ball Animal 3, the Eureka Mighty Mite, and the Dyson V15 Detect. Its important to note that suction is not the only factor to consider when choosing a vacuum, and other features such as portability, noise level, and ease of use should also be taken into account.