Getting my tax returns soon, and wanted to know which Kitchen Aid Mixer I should buy. Don't remember the model numbers, but is the 250Watt one good enough or should I spend the extra cash for the ones that are 300 + watts. I think the bigger wattage also come with the bigger the mixing bowl (4qt, 4.5qt, 5qt), will that make a difference, I'm hoping I can get several pies from one batch since I want to practice my stretching technique.