If you think you're going to stay in the hobby for a while and enjoy building, I highly recommend you get the cheapest scroll say you can for now. The reason why I say that is because once you get your band saw, you'll ONLY be using the scoll saw for inside cuts such as formers and lightening wing ribs etc.

Whether cutting plywood, and especially balsa, I can guarantee that you will use your band saw as your primary cutting tool once you see how it works like cutting through soft butter. And that's not EVEN to mention the excitement you'll feel the first time you band saw through a stack of 20 ribs all at once.

So I know you're only asking about the scroll saw, but take a serious look at getting a cheap one of those and then spending as much as you can for a really GOOD band saw.
While I have the Delta 14" Metal cutting bandsaw (with the variable speed transmission), that's a bit overkill, but you can pick up the standard Delta 14" open base model for about $500 or so which is a lot LESS than the cost of a good giant scale kit, and the band saw will be with you for life while the kit, well, won't

Here's a link to the least expensive 14" Delta in case you're interested. They also make a lighter duty 12" which would probably be fine for anything you want to do in the hobby (I'm also a woodworker so that's why I went overkill for the RC hobby).
http://www.deltamachinery.com/index.asp?e=136&p=919 for the description and
http://www.amazon.com/exec/obidos/tg...ccessories-all as one of the sources to buy it.

Highflight