I <3 the smell of sawdust
I'd stay away from the cheaper homeowner level of jig saws because it sounds like you are going to be using this tool fairly often, for longer periods of time to cut large, intricate designs. The better saws will run a lot smoother and quieter, being less fatiguing to you. But do try to test everything you can for all of it's attributes, such as noise, vibration, ergonomics (being comfortable in your hand for long periods of time), weight, features (such as being able to turn the blade inside the tool so that you don't have to turn the tool to weird, uncomfortable angles to get the cut you need, adjustability of the cut (blade moves fore/aft during the stroke). My DeWalt has an adjustable blower on it that blows the dust out of the way so that you can see your cut line. Things like that.
You'll need to get a few different types of blades. Some blades will help you cut a straighter line, and some will make tighter radius turns.