Jay, look at the WACO that Cox has. The Sig model you're looking at is a WRE, it has an enclosed cabin and was a sort of "Cadillac" that would seat four people and had a cruise speed of over 150 kts.

The WACO that Cox has is a YMF (arguable, really a UMF), which is an open cockpit plane, and probably the prettiest of all the WACO's. It's available in both 1/6 and 1/5 scale. There are threads on both in the ARF forum, as well as a building thread on the Antiques forum. Check 'em out.