RE: Best Second (But ARF)
I would look at one of Doc. Mathews planes, either the Bingo or the 4-60 (note not the star). I'm not sure if they are still available as a kit but RCM has the plans and they are both very easy to build from plans.
The 4-60 is a shoulder wing using a simi-symmetrical and was designed for a four stroke sixty sized engine (4-60) also as a 4-40 but not as good as the 60.
The Bingo uses the same wing plane but is a low wing with larger control surfaces, it will fly very well with a 4 stroke 60 but I use an OS.91 Surpass.
Both are easy to fly but will do many more maneuvers than a trainer. Ace used to kit these models but haven't in a while you may still find one. I like them because you will likely be the only one at the field with either.