RE: Next Plane After Trainer
You have a lot of good choices out there. Carl Goldberg "Tiger" 60, available as a kit and an arf. Great Flyer, trike gear, semi-semetrical wing for some aerobatics.
Sig 4*60. Pretty much as above. Both are low wing,
Both are easy kits and assemble well, Both of these also come in a .40 size if you wish.
Good Luck,
Steve