RE: Beging whit DF or Turbine?
Jasper,
Don't be afraid of DF's because they are pretty good if you have the right combination of Fan/Motor.
I am building a YA F-16 with an OS .91/Dynamax, and I am keping it very light. I don't think you could fly an Avonds with a DF though, it is way too big.
I learned how to fly jets with an F-16 (BVM) DF and had no problems with it, keep in mind that the YA and Avonds should be a lot more stable on slower speeds. I do recommend that if you decide for a turbine, there is no need to get an ugly turbine model like the 'roos and the Facet, they are very practical but it is more rewarding to build and fly a scale jet. The reason I say this is because you will most certain spend 100-150 hours building the model, so saving 40-50 is not saving anything at all, unless you're getting an ARF.
Funny, saying Ducted Fan is like saying Voldemont on Houghwarts.
On the other hand, if you got the $$$ get a frakin turbine. Your wife will love the smell of Kerosene, but your dog may not.
If you have questions you sure came to the right spot.
Regards,
David