RE: Phoenix Models Sukhoi SU-31 46
This is a great flying plane, but I don't think it would be appropriate for a 2nd plane.....you need to learn about things like tip stalls and throttle management on landing before flying something like this. If you're looking for a good 2nd plane that is a taildragger, check out the Four Star 40, or the World Models Skyraider Mach II. Also, the Tiger 2 is a great 2nd plane, and can be converted to a taildragger quite easily.
The Phoenix Sukhoi is not hard to fly, but it would be best suited as a 3rd or 4th plane. It would make a great first scale aerobat.