I definitely agree with dance sneakers hurting your knees...some advertise a "sweet spot" to make turns easier.
I have the Freedom Dansleeker from Capezio (I got them from Discount Dance too - love them!) -
http://www.discountdance.com/dancewe...e_FREE1.html?&
They are kind of between a dance sneaker and a dance shoe, they are very cute and light, and great for throwing on when I'm running errands. And the price is decent. I keep them in my dance bag, so I can throw them on if my feet start to hurt midway through practice.