Kitchenaid Ksm150pser Artisan Series Big Sale - I had a 4 1/2 qt. Kitchenaid mixer that served me well for many years. When it came time to replace it, I decided to go with a 5 qt. Artisan. I am so, so disappointed with it!.. KitchenAid's Professional 500 Stand Mixer is a substantial piece of equipment. The High Performance 325 watt motor delivers enough power to handle the heaviest mixtures, and mix large batches easily..