To me it depends on the rest of the diaper. If it has a really thin plastic that will stretch and sag, then I want a wasteband to give me freedom of movement with less stretching of the plastic. If it's a nice firm diaper waistband is optional.
I chose pricepoint, because on a bag of diapers I might pay an extra buck or two, but on a case I don't think I'd want $20 tacked on to the price.