Hi Larrie, I have the Agile conversion. You're welcome to come take a look at it here in NE PDX.
The reason I chose Agile was the TTB setup. I was going to go with MG's conversion but, after consulting with him, we both agreed that I would probably be happier with Agile's ability to give me the choice of the minimal lift I wanted (it's 3 inches), whereas his lift was going to be a minimum of about 6 inches. I just didn't want to have to use a ladder to get into the van.
I also think the ride is smoother, but that can be pretty subjective.
You've got a good idea to go and see/test drive them all, a great opportunity we have here in the PDX area.