Would not recommend a classic pattern plane like the KAOS as a second plane. Something like the Spot ON 50 might be better if you go the pattern route. Much more manueverable at lower speeds. Pattern planes are fun to fly and Pattern contests are a lot of fun to fly in.

You might also consider the Reactor .46. Very light wing loading and easy to fly. Not as precise as a Pattern plane but very aerobatic with a neutral wing. Will also do 3D if you want to try it. A pattern plane will not do any 3D stuff and they have heavier wing loading making landings more challenging. Pattern planes will stall quicker also if you pull too hard.