I have built a ton of kits. Just depends upon what you want from the plane. I built a GP RV40 with flaps and used a 40 2 stoke in it. Great flying little plane and it amazes me how easy it flys. For general sport flying in a 60 sized kit the Goldberg Sky Tiger is hard to beat. These are a couple of great flying/building sport Sunday fliers. Hope this helps.

JEB

OOPPS! I should have read the request a little closer. You asked about "Precision" flying planes. I enjoy the Goldberg Extra 300 for cost/performance.