... and Performer. I have no direct experience with the EcoTad, but from prior experience it seems like Sun builds their frames from cast iron, lead, and depleted uranium. How else could they make their products so heavy?

Have you considered attending the Smokey Mountain Recumbent Rally? It's a bit of a drive from W. Kentucky (SE of Knoxville); but it'd be a great chance to test ride lots of trikes. The year I went, it was something like 99 trikes and two recumbent bikes. And I think one kid on a mountain bike.