I think you've made an excellent choice. My family (dh, myself and 2 ds) have stayed there twice. My boys, 7 and 9, absolutely love the dig site pool and it is a beautiful resort. Some have complained that it is too spread out...I must say that is one thing I love about it!
We are going again in May and my family voted to stay there again even after looking at photos of the other resorts (including deluxes)!
The only negative: my husband detests the Pepper Market...my sons and I love it!
I think you'll be happy with Coronado, but I have several friends who have stayed at Riverside and loved it as well.
Good luck to you!
dizneyfan