A plane like this stick would be a great next step, [link]http://www.horizonhobby.com/Products/Default.aspx?ProdID=EFL2350[/link].

Just look for a 4 channel plane, but not necessarily a 3D plane. 3D planes are somewhat unstable by nature since that is required to perform some of the manuevers we ask of them.

BTW, this particular forum is for the support of planes manufactured by 3D Foamy.