RE: 3rd plane?
Depends on what you want. If you want to go to some balsa models ....for aerobatics I would go for a Mini Ultra stick....for sport/aerobatic/3d I would go for a 3DHS 47" extra SHP. Thats two excellent 3rd planes. The MUS was my second and the SHP was my 3rd and I still love to fly both of them.