If you are looking for an affordable entry level ducted fan jet that is simple and fast to build and you will become very comfortable with it the first time you fly it, try the TGA F-15 Ultra eagle III. I started with one and I'd recommended it to anyone. It's a great starter jet.
Another alternative might be the Dynamax powered TGA Topcat. I am putting one on my Topcat and Ill let everyone know how it turns out. Paul