If you can find one the Bingo is very easy to fly and will give the low wing experience that you will need for the Cap. Ace used to kit the Bingo but I have not seen one in a while (built mine from RCM Plans).

A Sig 4*60 is very similar to the Bingo and would work also, I just like to have something that there is not going to be four of five others at the field.

I also think that you could skip the high wing trainer if you can handle the Zagi an because of the size difference I don't think the speed would be that apparent.