Gonna go with recommending a hopper as well. I don't like doing the "let's spend one day at this park and one day at the other". I like the freedom of being able to just waltz out of one park and into another, and vice versa. Sure, it's a long walk at times, but I paid for two parks and I'm sure as heck gonna visit both of them and go on whatever rides I feel like riding. xD
In any case, some people do like to do the one day here, one day there thing and that's up to you. It's easier with three day park hoppers because we don't feel like we have to rush, but two is just fine as well.