Costco had a 4.5 qt Ultrapower Plus mixer on clearance for $150, which I bought. It has a pouring shield and a bowl with a handle. Costco also sells a professional 6qt Professional 600 Design Series with a glass bowl for 300, plus a $50 mail in rebate. Its beautiful, but the glass bowl is very heavy I think, and the reviews are not good due to the mixer not passing the dime test/uneven mixing. Should I keep the Ultra Power, or take a chance at the Professional? I worry about the uneven mixing, and the weight of the bowl. It might deter me from using it as often? As for the ultra power, I worry about longevity. I would make a loaf or two of bread a week.