Lots of people fly Sig four stars for second planes. Nice looking plane, and can be tame, yet can do most aerobatic moves. Cubs would make a nice second plane (although they require a little more rudder input while flying), Goldberg makes a nice cub arf. There is the Phoenix Dolphin ARF similar lines to the sig 4 *. So many choices really. Have you narrowed it down at all?? Find some planes you like and let us know, we can then advise you of their flying charicteristics. In the meantime keep flying what you have, sounds like your doing great!