RE: Second Plane Time!
I'd steer you toward either the 4*60 or the Stick as well.
When you get to a full-up building project, you might be surprised at how quickly a good kit goes together. (And right now, you should have a bit of time before you need the second-plane plane. Because if something happens to your primary trainer anytime real soon, it's a sign that a repair job or a new primary trainer would be a good thing to do, so the second-plane plane shouldn't be needed for a little while yet.)
I told you that so I could tell you this: if you build, consider the BTE Venture 60 over the 4*60. The SIG kit is good, it builds into an excellent plane, and its design comes directly from the works of Bruce Tharpe... The Venture is an outstanding kit with the best machine-cut parts on the market; it builds into a plane that is based on the 4*60 but better, incorporating improvements by the 4* series' originator, Bruce Tharpe. Especially with limited kit building experience, the Venture is a real pleasure to build.