The KitchenAid Professional 610 Stand Mixer is expensive but also worth every penny. This is my second KitchenAid. I started with the Artisan (I gave it to a charity in town) and now I've graduated to the Pro 610. I chose the KitchenAid Pro 610 because I mix a lot of large batches and heavy doughs. I have to say that my sourdough bread has been better than ever!