Note that this is the 5-quart version; if you have a large family or do a LOT of baking, the models with the larger bowls are preferable, though this one does well for your typical recipes (cakes, breads, etc).
The wattage of the mixers varies, as well. This sports the 325-watt motor, while others sport 575, 600, and other wattages. What's more important than the wattage, however, is the gearbox. The Pro Series, as I understand it, can handle a bit more work (multiple loaves of bread, heavy mixes, etc), while the Artisan models are for the average baker.
Don't get me wrong - you should be able to mix bread with these without any issue, but the plastic gear is the weak link. The resistance a thick mixture would produce will be transmitted directly to the gearbox, where that weak link resides, and cause heavier wear than, say, a cake mix. It's all relative.
All said, I think this is a good mixer, and perfect for an average family. Keep in mind, these are not made/manufactured by Hobart (as they were years ago), but Whirlpool. They aren't built like they used to be, but they *are* easy to repair if necessary, and there is a wealth of information at your fingertips by simply searching the web for your model number (parts diagrams, repair guides, diagnoses, etc), which, for me, offsets any difference in manufacturing quality.