I have a Kitchenaid and a Thermomix. I realise that they are not in everyone's price range, but they are excellent. Before them I had a Sunbeam Compact Kitchen Pro mixer. Useful enough, but not powerful enough for doughs and large quantities. As a processor I have and still use my Kenwood stick blender with multiple attachments. It has a large jug that has processed many biscuit bases. I still use it almost every day (the other attachments - I blew up the large jugs gears lol). I also had the Sunbeam processor they sell at Target, but my KW stick processor had the same amount of power and less fiddling, so I sold it.

My Mum has a Kenwood, and it is just as awesome as my KA, but she has a top of the line model. A GF of mine bought one of their smaller newer models last year and loves it. She bakes lots.

ETA depends what type of dough you're making as to what machine you'd use.