RE: The ultimate second plane poll question!
I built a Four Star 40 from a kit before I even started flying my trainer. It is a very easy build, and a great flying plane. There are lots of other great choices too.
You can also narrow things down a bit if you can decide on kit vs. ARF, and on trike vs. tail dragger. Most trikes can be converted to tail draggers, but not the other way around.
I think the Four Star and Tiger are the more popular choices, but I also hear good things about the Phoenix models.
Good luck.
Edit - And to keep things apples-to-apples, you should probably be considering the Goldberg Tiger 2 rather than the Tiger 60, unless you want a .60 size, then some of the others are available as .60's too.