RE: Advice on 2nd Plane
I just came back from the field and maidened A Sig Mid Star 40 for A friend, very good second plane, not sure but it may be A kit only plane. I also tested a lot of the 4* series and it's another good choice.
From your list the only one that really jumps out at me as an advanced trainer is the T-34 Mentor, another outstanding advanced trainers. I don't even like to use the term trainer in this except being second or third planes that's pretty much what they are supposed to be. One club I belonged to and another I flew at had the H-9 T-34 racing class so it sort of tossed that trainer title out the window. It's A very good stunter.