Personaly Daniel,
I would go with the Faller rides first like the Giant Wheel then then Musik Express there a step above the IHC (A little harder) Then go with the RAH models. It just gives you more experience. For Instance, I've built all the IHC kits and about 3/4 of the Faller kits. And when I got my first RAH ride I had a little trouble with it! It makes it a little easier on your part. Just a suggestion. [;)]