Yes, that sounds about right to me. Definitely two day for Sea World - consider Quick Queue and reserved seating - they are relatively inexpensive and cut down on the lines and having to get to a show 30 minutes prior for seating. Really depends on budget considerations. STRONGLY CONSIDER Dine with Shamu - it is awesome and at $30 for a buffet and the little show, a great value. And the food is very good!
My family likes Aquatica more than any other single park in Orlando. It's hard to explain why, we just love the vibe, the attractions, and we are a family that loves water. The drop slides are great (I go as many times as my knee will allow me to climb), and we could spend hours in Roa's Rapids alone. Our last visit was off season in the rain, and it felt like there was only 200-300 people in the entire park, it was simply awesome!