RE: Ready for second plane?
I vote for a Tiger II or a Great Plane Cherokee. If you are worried about the hot approach; the GP Cherokee as the option of flaps.
Dont get rid of the trainer. You can add a bomb drop to it or convert it to a taildragger. My spad trainer; I added a bomb drop and I like to fly around a tree that at the edge of the field (now I'm thinking on trying it inverted).