Ready to book for our first visit to BC (or maybe YC) for mid March.

I have been looking through the threads and found so much information and many good photos of room views. Room view is very important to us since we have 2 young children and will be spending 2 or 3 days as resort days (non-park days).
I'm thinking we need to book a water view so we are assured of a nice view but I am not sure if the best water views are at BC or YC. All opinions appreciated!!
Can anyone help with what views are available at each resort? Does BC have Epcot fireworks view? What is/are the most requested view(s)?
Are there many nice standard views?
Thanks BC/YC fans!! We are so excited to be staying here!!