I kept hearing about Seaworld, too, and it took us a long time to actually get there. Now it's our favorite park. It's less about rides, more shows and exhibits, but very relaxing. There's a lot of educational value there, too, if anyone is interested. We ended up taking advantage of their "second day free" ticket, and went back.
Check their website for deals. We're doing the Orlando Flex ticket this time, but they sometimes have adults pay kid's price, second day free, or other promotions.