All upright vacuum are the same. Look for one that have the least feature and attachments, because they are last longer. Most vacuum at 7.5amps will do the job for the average home, but you could get 12amps vacuum if you think you need it. In reality the 12apms is about 20% more powerful than the 7.5amps vacuum. It is not the suction that you need to worry about, because brush is the part that do most of the job, and all brushes are very much the same.