As a couple of buddies over here taught me, flying does not need to be expensive to be fun. This plane was designed to be pure Fun, so don't worry about the servos too much. If you can afford digitals, don't worry too much about which ones as at the end of the day, they will be pretty much the same in a model of this size. Most of the 3D moves are done so slow anyway, that power isn't such an issue!
Enjoy!!!!!