There are a lot of well behaved planes that will make a great second plane. The only type you should stay away from are the tappered wing aerobats like the Extra, Edge... a lot of them tend to be pretty snappy and can be a real headache. in a nutshell just about anything with a symetrical constant cord wing is likely to do the trick.

The Ultra is certainly a good choice, much more aerobaticaly capable than a trainer, but still a lot like your trainer. flip the flaps on and you can crawl around slow. Good choice for getting familiar with tail dragers. if you get one, Use nylon bolts on the landing gear.


Depending on your personality, another good choice might be a Somthing Extra. much smaler and very capable of wild spins... but if you keep the control rates reasonably small it behaves very nicely. Be sure to add big high contrast spots or stripes to the bottom of the wing. Very helpfull for keeping orientation. The SE arf is decorated the same on top as it is on bottom.