I'm gonna miss my Crocs... Please Help

I am starting Nursing School in the fall. I currently work at the hospital as an OB Tech 2 days a week, 12 hour shifts. At work I wear Crocs Professional, and I LOVE them. Unfortunately, they won't let me wear them for clinical. My school's shoe specs are:

• All White
• Leather
• No High Tops
• Not Clogs
• "Duty Shoes"

I have been considering different shoes. Our clinicals are about 6 hrs, 2 days per week. I am not sure that I want to spend an arm and a leg for so few hours. At Walmart I saw Dr. Scholls shoes for approx. $30 and was considering them. I have also considered New Balance. Anyone with any input on this I would greatly appreciate it. I am totally at a loss at what I should look at. Thanks.