For several years now I've made a very stiff bagel dough (Reinhart recipe) using an old K-45 Kitchenaid mixer. The mixer can handle the dough, but the capacity of the bowl is on the small size. I've been searching for a replacement mixer that can (1) handle this very stiff dough consisting of approx. 8 cups of bread flour, and (2) which can take on larger batches of ordinary bread dough than the K-45 can handle (the dough creeps up the dough hook). I have tried a Viking and Cuisinart, neither of which were able knead the bagel dough. I am now considering the Bosch, Hamilton Beech (commercial), Kenwood, De Longhi. I'd appreciate any advice regarding my options.  Thanks.